三位数乘两位数的口算

三位数乘两位数教学目标知识与能力结合具体情境，理解两位数乘一位数、整百数乘整十数口算的基本方法和算理，体验其口算方法的多样化，并能正确地进行口算，形成一定的计算能力。

过程与方法1.在解决实际问题的过程中，让学生经历发现两位数乘一位数、正柏树乘整十数口算的今本方法的全过程。

2.通过对各种方法的比较，能寻找最佳或最适合自己的方法，培养学生优化策略的思想方法。

情感、态度与价值观1.在解决简单问题的过程中，体验数学与生活的联系，感受数学的价值。

2.培养学生在自主探索、合作交流的活动中，进一步体验数学学习的乐趣，获取成功的体验。

教学重难点重点1.体验口算方法的多养活，并能正确地进行口算。

难点整百数乘整十数口算的算理。

教学设计一、创设情境，激趣导入谈话：奥运会是备受人们关注的世界体育盛会，特别是2008年的北京奥运会更为全民关注。

青岛作为2008年北京奥运会的和办成事，在筹备的过程中做啦大量的工作。

（出示信息窗1上半部分呈现的海上竞渡情境）1.学生读信息请大家继续欣赏图片提问:谁能说说你从这一幅图片中得到了哪些信息？（教师摘要板书）（1）已经工作了3个月，平均每个月挖出淤泥18万吨。

（2）泥驳船每次运走400吨淤泥，本月运了20次。

2.根据信息提出问题。

提问：根据我们得到的这些数学信息，你能提出什么数学问题呢？学生提问题教师把本节课要重点解决的问题板书在黑板上并与板书的数学信息相对应，构成应用题结构。

已经工作了三个月，平均每个月挖出淤泥18万吨，3个月一共挖出淤泥多少万吨？泥驳船每次运走400吨淤泥，本月运了20次，这艘泥驳船本月运了多少次?（学生齐读题）(设计意图：带领学生欣赏信息窗的图画，并从中搜集有关的数学信息，引导学生根据已知的信息提出问题，培养学生的问题意识。

)二、体验感悟，快乐分享1.学生自主探索我们先解决第一个问题，三个月挖出多少万吨淤泥？你会怎样列式？（学生在练习本上列算式）指名回答，教师板书：18×3＝（万吨）谈话：你能很快算出结果吗？学生尝试口算，指明不同想法的学生说一说他的思考过程。

四年级学生学习口算和竖式计算的内容，其中包括了三位数乘两位数的计算。

在这个年级，学生已经学会了前面三年所学习的基础口算和竖式计算的技巧。

他们已经能够熟练地进行两位数的口算和竖式计算，并且已经掌握了进位和借位的概念。

在学习三位数乘两位数的口算和竖式计算之前，老师会对前面所学的内容进行复习，确保学生已经掌握了这些基本技能。

在进行三位数乘两位数的口算时，学生首先需要掌握三位数和两位数的相乘的口诀。

例如，当三位数的个位数和两位数的个位数相乘，结果是个位数的积；当三位数的十位数和两位数的个位数相乘，结果是十位数的积；当三位数的百位数和两位数的个位数相乘，结果是百位数的积。

然后，学生需要将三位数的百位数、十位数和个位数和两位数的个位数和十位数逐位相乘，得到积，最后将这些积相加得到结果。

通过多次练习，学生可以逐渐提高自己的口算能力，实现对三位数乘两位数的正确和快速计算。

在进行三位数乘两位数的竖式计算时，学生需要将三位数和两位数进行竖式的对齐，从个位数开始逐位相乘，并将结果写在相应的位置上。

然后，学生将每一位乘得的数将其与前一位乘得的数相加，最后得到结果。

学生需要注意竖式计算中的进位操作，以及在最后一步相加时可能涉及到的进位操作。

通过多次练习，学生可以熟练地完成三位数乘两位数的竖式计算，提高计算的准确性和效率。

总之，四年级学生在口算和竖式计算的基础上，学习了三位数乘两位数的口算和竖式计算。

通过反复练习和巩固，学生可以掌握并熟练运用这些技能。

这将为学生今后的学习打下坚实的基础，并为他们深入学习更复杂的数学运算做好准备。

三位数乘以两位数的口算方法如下：
1 先将乘数的第一位数与被乘数的每一位数相乘，得到的积依次写
在被乘数的每一位右侧。

如果有进位，则将进位写在下一位的左侧。

2 再将乘数的第二位数与被乘数的每一位数相乘，得到的积依次写
在被乘数的每一位的左侧。

如果有进位，则将进位写在下一位的左侧。

3 最后将两步得到的乘积相加，得到最终的结果。

举个例子，对于三位数456和两位数78的乘积，可以这样计算：
1 先将乘数的第一位数8与被乘数的每一位数相乘，得到的积依次
写在被乘数的每一位右侧。

456*8=3648，写成这样：
4|6|4|8
2 再将乘数的第二位数7与被乘数的每一位数相乘，得到的积依次
写在被乘数的每一位的左侧。

456*7=3192，写成这样：
3|1|9|2
3 最后将两步得到的乘积相加，得到最终的结果。

4|6|4|8
3|1|9|2
3|8|4|0
因此，456*78=3840。

需要注意的是，在口算过程中要注意计算的顺序，并且要细心核对计算结果，避免出现错误。

月日姓名:练习范围：三位数乘两位数题分秒成绩: 数：100530 × 15 = 103 × 60 = 800 × 10 = 100 × 35 = 280 × 30 = 990 × 10 = 898 × 10 = 125 × 70 = 510 × 10 = 154 × 50 = 252 × 28 = 400 × 20 = 180 × 10 = 111 × 10 = 123 × 50 = 162 × 40 = 120 × 44 = 40 × 80 = 360 × 20 = 552 × 10 = 472 × 20 = 140 × 31 = 272 × 10 = 660 × 14 = 912 × 10 = 150 × 10 = 300 × 10 = 658 × 10 = 239 × 37 = 505 × 18 = 423 × 16 = 262 × 10 = 235 × 40 = 490 × 10 = 550 × 16 = 200 × 22 = 136 × 45 = 80 × 20 = 432 × 10 = 243 × 16 = 310 × 20 = 379 × 20 = 127 × 25 = 190 × 40 = 355 × 19 =540 × 10 = 160 × 30 = 408 × 10 = 100 × 80 = 953 × 10 = 210 × 44 = 500 × 10 = 102 × 40 = 165 × 32 = 688 × 11 = 911 × 10 = 576 × 10 = 304 × 25 = 160 × 50 = 114 × 73 = 515 × 10 = 470 × 10 = 578 × 10 = 541 × 10 = 170 × 28 = 954 × 10 = 728 × 10 = 335 × 10 = 650 × 10 = 184 × 26 = 630 × 15 = 315 × 30 = 200 × 50 = 331 × 10 = 199 × 26 = 420 × 15 = 100 × 20 = 129 × 50 = 218 × 10 = 335 × 12 = 410 × 20 = 280 × 12 = 600 × 10 = 120 × 53 = 215 × 23 = 200 × 20 = 140 × 13 = 270 × 30 = 580 × 10 = 500 × 20 = 100 × 70 = 930 × 10 = 175 × 46 = 160 × 60 = 330 × 24 = 150 × 56 = 900 × 10 = 565 × 10 = 100 × 90 = 265 × 10 =月日姓名:练习范围：三位数乘两位数题分秒成绩: 数：100720 × 10 = 246 × 36 = 390 × 13 = 223 × 40 = 199 × 26 = 103 × 90 = 156 × 60 = 235 × 40 = 290 × 14 = 280 × 30 = 160 × 23 = 80 × 20 = 424 × 15 = 290 × 17 = 140 × 24 = 820 × 10 = 250 × 20 = 310 × 28 = 335 × 12 = 162 × 40 = 336 × 10 = 312 × 31 = 148 × 20 = 175 × 46 = 10 × 50 = 129 × 54 = 595 × 12 = 184 × 26 = 359 × 25 = 198 × 13 = 990 × 10 = 331 × 10 = 953 × 10 = 410 × 17 = 400 × 10 = 285 × 20 = 100 × 84 = 140 × 60 = 400 × 20 = 150 × 40 = 155 × 60 = 262 × 10 = 160 × 60 = 134 × 40 = 140 × 31 =631 × 10 = 195 × 36 = 236 × 40 = 258 × 33 = 200 × 30 = 392 × 25 = 913 × 10 = 240 × 30 = 152 × 42 = 600 × 10 = 464 × 20 = 106 × 10 = 120 × 44 = 370 × 18 = 550 × 10 = 688 × 11 = 470 × 12 = 440 × 10 = 435 × 20 = 363 × 20 = 162 × 60 = 630 × 10 = 230 × 37 = 200 × 24 = 142 × 30 = 100 × 80 = 431 × 10 = 341 × 25 = 675 × 10 = 265 × 30 = 390 × 10 = 380 × 10 = 180 × 11 = 120 × 75 = 132 × 20 = 190 × 40 = 246 × 30 = 634 × 10 = 385 × 14 = 114 × 73 = 430 × 20 = 300 × 10 = 295 × 10 = 165 × 20 = 270 × 23 = 129 × 50 = 700 × 10 = 224 × 28 = 149 × 33 = 250 × 40 = 180 × 30 = 218 × 10 = 475 × 17 = 225 × 10 = 158 × 60 =月日姓名:练习范围：三位数乘两位数题分秒成绩: 数：100590 × 10 = 137 × 60 = 210 × 44 = 410 × 20 = 688 × 11 = 400 × 14 = 470 × 12 = 224 × 28 = 199 × 26 = 550 × 10 = 556 × 15 = 120 × 56 = 934 × 10 = 335 × 12 = 334 × 20 = 400 × 10 = 180 × 20 = 190 × 40 = 149 × 10 = 330 × 10 = 141 × 68 = 869 × 10 = 240 × 20 = 552 × 10 = 304 × 25 = 516 × 15 = 630 × 15 = 953 × 10 = 149 × 55 = 200 × 20 = 100 × 90 = 192 × 50 = 300 × 10 = 359 × 25 = 80 × 20 = 898 × 10 = 560 × 10 = 290 × 14 = 175 × 46 = 431 × 10 = 390 × 10 = 119 × 60 = 158 × 60 = 110 × 70 = 149 × 50 =655 × 12 = 460 × 15 = 262 × 10 = 108 × 20 = 90 × 20 = 300 × 20 = 530 × 10 = 630 × 10 = 161 × 29 = 520 × 12 = 755 × 10 = 125 × 70 = 310 × 25 = 600 × 10 = 149 × 33 = 262 × 34 = 230 × 40 = 100 × 80 = 100 × 35 = 212 × 10 = 958 × 10 = 633 × 12 = 181 × 20 = 160 × 10 = 258 × 20 = 280 × 30 = 246 × 30 = 490 × 10 = 184 × 26 = 190 × 38 = 132 × 20 = 270 × 23 = 310 × 28 = 388 × 10 = 103 × 90 = 200 × 10 = 100 × 60 = 134 × 60 = 565 × 10 = 162 × 40 = 235 × 40 = 577 × 11 = 140 × 31 = 214 × 20 = 198 × 13 = 121 × 63 = 160 × 60 = 990 × 10 = 100 × 84 = 250 × 40 = 130 × 21 = 230 × 30 = 660 × 14 = 120 × 83 = 165 × 32 =月日姓名:练习范围：三位数乘两位数题分秒成绩: 数：100820 × 10 = 368 × 24 = 135 × 30 = 750 × 13 = 470 × 12 = 165 × 32 = 158 × 60 = 755 × 10 = 280 × 30 = 901 × 10 = 800 × 10 = 680 × 10 = 150 × 40 = 140 × 60 = 300 × 20 = 930 × 10 = 630 × 15 = 530 × 11 = 500 × 15 = 700 × 10 = 300 × 30 = 304 × 25 = 965 × 10 = 100 × 70 = 108 × 25 = 132 × 10 = 240 × 11 = 300 × 10 = 100 × 35 = 246 × 36 = 160 × 23 = 134 × 10 = 500 × 20 = 260 × 30 = 236 × 20 = 250 × 40 = 130 × 23 = 410 × 17 = 180 × 10 = 280 × 12 = 100 × 84 = 600 × 10 = 900 × 10 = 370 × 16 = 120 × 53 =257 × 27 = 178 × 25 = 390 × 13 = 295 × 22 = 270 × 35 = 370 × 20 = 550 × 16 = 100 × 50 = 740 × 10 = 110 × 70 = 145 × 10 = 355 × 19 = 180 × 30 = 257 × 10 = 700 × 11 = 328 × 22 = 230 × 24 = 114 × 73 = 200 × 40 = 950 × 10 = 224 × 28 = 125 × 70 = 400 × 20 = 130 × 21 = 140 × 31 = 149 × 33 = 331 × 10 = 210 × 44 = 90 × 60 = 170 × 20 = 123 × 50 = 370 × 14 = 120 × 74 = 380 × 26 = 180 × 20 = 898 × 10 = 200 × 10 = 184 × 26 = 103 × 90 = 217 × 10 = 688 × 11 = 290 × 14 = 892 × 10 = 165 × 20 = 262 × 10 = 120 × 22 = 90 × 80 = 660 × 14 = 195 × 36 = 400 × 14 = 129 × 50 = 180 × 11 = 270 × 23 = 199 × 26 = 305 × 26 =月日姓名:练习范围：三位数乘两位数题分秒成绩: 数：100103 × 90 = 110 × 52 = 410 × 17 = 624 × 10 = 540 × 10 = 290 × 14 = 100 × 90 = 374 × 21 = 180 × 40 = 195 × 15 = 20 × 30 = 930 × 10 = 160 × 14 = 335 × 20 = 217 × 10 = 326 × 20 = 280 × 12 = 100 × 70 = 400 × 20 = 755 × 10 = 310 × 28 = 262 × 10 = 331 × 10 = 410 × 20 = 224 × 28 = 112 × 65 = 110 × 68 = 160 × 60 = 243 × 16 = 917 × 10 = 898 × 10 = 246 × 36 = 350 × 10 = 475 × 17 = 195 × 36 = 647 × 10 = 162 × 40 = 470 × 12 = 688 × 11 = 235 × 40 = 130 × 53 = 104 × 82 = 240 × 16 = 132 × 20 = 408 × 10 =160 × 23 = 120 × 55 = 700 × 10 = 198 × 34 = 740 × 12 = 160 × 30 = 900 × 10 = 140 × 31 = 104 × 40 = 390 × 10 = 199 × 26 = 355 × 19 = 230 × 34 = 100 × 20 = 410 × 12 = 90 × 40 = 500 × 20 = 270 × 31 = 190 × 10 = 338 × 25 = 600 × 10 = 390 × 13 = 100 × 80 = 197 × 40 = 928 × 10 = 631 × 10 = 310 × 22 = 469 × 16 = 129 × 50 = 252 × 30 = 130 × 70 = 184 × 26 = 130 × 21 = 630 × 15 = 240 × 30 = 115 × 50 = 550 × 10 = 466 × 10 = 380 × 10 = 630 × 10 = 336 × 10 = 198 × 13 = 260 × 20 = 431 × 10 = 343 × 23 = 180 × 10 = 633 × 12 = 182 × 45 = 300 × 20 = 300 × 10 = 652 × 15 = 149 × 33 = 214 × 30 = 492 × 18 = 472 × 20 =月日姓名:练习范围：三位数乘两位数题分秒成绩: 数：100468 × 20 = 200 × 40 = 103 × 90 = 660 × 14 = 140 × 51 = 125 × 70 = 240 × 26 = 493 × 12 = 140 × 65 = 624 × 15 = 180 × 10 = 100 × 84 = 180 × 11 = 184 × 26 = 130 × 21 = 431 × 10 = 210 × 44 = 50 × 10 = 953 × 10 = 20 × 10 = 320 × 26 = 199 × 26 = 120 × 53 = 630 × 10 = 470 × 12 = 755 × 10 = 239 × 32 = 270 × 23 = 631 × 10 = 782 × 10 = 175 × 46 = 688 × 11 = 160 × 23 = 120 × 44 = 363 × 21 = 500 × 20 = 200 × 20 = 134 × 40 = 120 × 80 = 280 × 12 = 200 × 27 = 110 × 70 = 232 × 10 = 180 × 20 = 130 × 20 =800 × 10 = 140 × 60 = 200 × 10 = 218 × 10 = 120 × 83 = 359 × 25 = 892 × 10 = 335 × 12 = 243 × 16 = 10 × 80 = 330 × 24 = 140 × 27 = 246 × 30 = 331 × 10 = 336 × 10 = 633 × 12 = 490 × 16 = 245 × 14 = 162 × 40 = 540 × 10 = 270 × 29 = 100 × 90 = 100 × 20 = 217 × 10 = 460 × 20 = 418 × 17 = 310 × 10 = 330 × 10 = 150 × 40 = 114 × 75 = 280 × 20 = 280 × 30 = 123 × 50 = 200 × 50 = 165 × 32 = 160 × 20 = 198 × 13 = 235 × 40 = 380 × 20 = 156 × 20 = 200 × 30 = 410 × 20 = 110 × 40 = 150 × 10 = 190 × 50 = 174 × 56 = 900 × 10 = 132 × 20 = 472 × 20 = 820 × 10 = 990 × 10 = 750 × 12 = 460 × 10 = 235 × 30 = 129 × 50 =月日姓名:练习范围：三位数乘两位数题分秒成绩: 数：100120 × 83 = 198 × 13 = 837 × 11 = 200 × 10 = 409 × 20 = 120 × 53 = 892 × 10 = 410 × 17 = 100 × 60 = 116 × 30 = 552 × 10 = 310 × 28 = 180 × 16 = 180 × 20 = 125 × 70 = 550 × 16 = 565 × 10 = 990 × 10 = 120 × 20 = 160 × 60 = 408 × 10 = 199 × 26 = 200 × 20 = 720 × 12 = 243 × 16 = 160 × 20 = 336 × 10 = 325 × 30 = 165 × 20 = 390 × 13 = 184 × 26 = 105 × 80 = 316 × 25 = 260 × 16 = 246 × 36 = 100 × 22 = 280 × 34 = 145 × 66 = 224 × 28 = 110 × 18 = 620 × 13 = 100 × 20 = 130 × 21 = 280 × 30 = 122 × 45 =110 × 70 = 470 × 12 = 129 × 50 = 320 × 14 = 390 × 10 = 140 × 50 = 216 × 34 = 130 × 60 = 160 × 30 = 195 × 32 = 140 × 20 = 270 × 23 = 898 × 10 = 198 × 49 = 70 × 40 = 140 × 10 = 900 × 10 = 170 × 55 = 130 × 69 = 100 × 35 = 700 × 10 = 630 × 10 = 885 × 10 = 50 × 80 = 400 × 20 = 196 × 26 = 334 × 23 = 210 × 10 = 335 × 12 = 510 × 19 = 332 × 25 = 560 × 12 = 755 × 10 = 331 × 10 = 130 × 41 = 410 × 20 = 260 × 15 = 820 × 10 = 390 × 16 = 314 × 10 = 100 × 84 = 500 × 17 = 633 × 12 = 206 × 40 = 217 × 10 = 160 × 46 = 600 × 10 = 598 × 13 = 120 × 64 = 150 × 20 = 160 × 23 = 688 × 11 = 660 × 14 = 720 × 10 = 149 × 33 =月日姓名:练习范围：三位数乘两位数题分秒成绩: 数：100149 × 33 = 445 × 18 = 330 × 24 = 675 × 10 = 160 × 23 = 196 × 45 = 660 × 14 = 345 × 16 = 100 × 35 = 953 × 10 = 150 × 50 = 40 × 40 = 470 × 12 = 331 × 10 = 100 × 30 = 140 × 31 = 480 × 10 = 175 × 46 = 400 × 20 = 612 × 15 = 380 × 10 = 350 × 13 = 313 × 30 = 180 × 11 = 100 × 60 = 500 × 17 = 299 × 30 = 160 × 15 = 122 × 80 = 990 × 10 = 198 × 34 = 204 × 33 = 150 × 37 = 246 × 36 = 150 × 38 = 304 × 25 = 167 × 30 = 150 × 40 = 330 × 25 = 266 × 15 = 634 × 10 = 631 × 10 = 472 × 20 = 239 × 37 = 196 × 32 =280 × 12 = 431 × 10 = 198 × 13 = 335 × 12 = 230 × 38 = 103 × 90 = 100 × 40 = 130 × 21 = 115 × 78 = 195 × 36 = 100 × 52 = 60 × 20 = 165 × 20 = 426 × 10 = 217 × 10 = 839 × 10 = 600 × 10 = 230 × 43 = 250 × 40 = 200 × 10 = 120 × 34 = 200 × 20 = 100 × 84 = 262 × 10 = 116 × 20 = 159 × 30 = 290 × 20 = 123 × 50 = 117 × 49 = 130 × 10 = 70 × 20 = 220 × 33 = 630 × 15 = 536 × 10 = 310 × 28 = 185 × 10 = 120 × 83 = 633 × 12 = 280 × 30 = 770 × 10 = 90 × 10 = 136 × 65 = 143 × 40 = 300 × 30 = 410 × 17 = 145 × 55 = 506 × 10 = 210 × 26 = 80 × 50 = 270 × 23 = 110 × 39 = 380 × 18 = 195 × 28 = 235 × 40 = 430 × 15 =月日姓名:练习范围：三位数乘两位数题分秒成绩: 数：100330 × 24 = 863 × 10 = 165 × 20 = 552 × 10 = 210 × 30 = 160 × 60 = 80 × 20 = 160 × 58 = 228 × 15 = 475 × 17 = 130 × 72 = 100 × 50 = 195 × 36 = 170 × 30 = 990 × 10 = 336 × 10 = 199 × 26 = 930 × 10 = 115 × 30 = 410 × 17 = 500 × 10 = 633 × 12 = 198 × 13 = 214 × 30 = 217 × 10 = 180 × 11 = 631 × 10 = 400 × 20 = 170 × 44 = 162 × 40 = 210 × 44 = 175 × 46 = 580 × 14 = 129 × 50 = 200 × 16 = 630 × 10 = 250 × 35 = 318 × 30 = 224 × 28 = 235 × 40 = 153 × 30 = 820 × 10 = 100 × 90 = 100 × 40 = 130 × 21 =198 × 34 = 160 × 23 = 180 × 10 = 700 × 10 = 246 × 36 = 110 × 65 = 220 × 43 = 630 × 15 = 152 × 30 = 500 × 20 = 335 × 12 = 120 × 83 = 270 × 15 = 487 × 20 = 390 × 13 = 100 × 20 = 898 × 10 = 100 × 84 = 344 × 10 = 182 × 45 = 244 × 10 = 120 × 44 = 225 × 14 = 717 × 10 = 250 × 20 = 800 × 10 = 550 × 16 = 123 × 50 = 410 × 20 = 140 × 60 = 270 × 23 = 250 × 40 = 270 × 20 = 280 × 20 = 472 × 20 = 158 × 17 = 145 × 46 = 550 × 10 = 170 × 10 = 892 × 10 = 264 × 35 = 932 × 10 = 688 × 11 = 796 × 10 = 400 × 14 = 200 × 10 = 307 × 24 = 280 × 12 = 320 × 20 = 154 × 49 = 138 × 12 = 150 × 43 = 200 × 30 = 431 × 10 = 132 × 20 =月日姓名:练习范围：三位数乘两位数题分秒成绩: 数：100550 × 10 = 190 × 50 = 688 × 11 = 50 × 40 = 410 × 11 = 800 × 10 = 110 × 28 = 500 × 10 = 110 × 10 = 345 × 22 = 239 × 11 = 180 × 36 = 125 × 70 = 400 × 10 = 930 × 10 = 410 × 20 = 246 × 30 = 224 × 28 = 383 × 25 = 900 × 10 = 470 × 12 = 40 × 60 = 199 × 26 = 200 × 20 = 120 × 44 = 408 × 10 = 170 × 26 = 158 × 60 = 135 × 56 = 240 × 30 = 100 × 40 = 168 × 45 = 180 × 10 = 400 × 14 = 162 × 40 = 560 × 15 = 898 × 10 = 953 × 10 = 500 × 20 = 540 × 10 = 312 × 25 = 239 × 37 = 114 × 10 = 100 × 10 = 175 × 46 =136 × 70 = 335 × 12 = 165 × 32 = 244 × 40 = 130 × 40 = 100 × 20 = 582 × 15 = 700 × 10 = 149 × 33 = 246 × 36 = 120 × 83 = 471 × 16 = 30 × 30 = 243 × 16 = 240 × 26 = 130 × 21 = 100 × 84 = 600 × 10 = 100 × 35 = 336 × 10 = 520 × 10 = 625 × 11 = 200 × 50 = 670 × 10 = 331 × 10 = 482 × 15 = 169 × 11 = 250 × 40 = 123 × 50 = 298 × 10 = 552 × 10 = 235 × 10 = 200 × 30 = 431 × 10 = 110 × 70 = 272 × 30 = 380 × 10 = 410 × 18 = 300 × 10 = 280 × 12 = 685 × 14 = 550 × 16 = 263 × 33 = 146 × 20 = 210 × 44 = 130 × 75 = 565 × 10 = 125 × 50 = 100 × 70 = 510 × 10 = 160 × 23 = 184 × 26 = 633 × 12 = 321 × 30 = 165 × 20 =月日姓名:练习范围：三位数乘两位数题分秒成绩: 数：100400 × 20 = 690 × 10 = 280 × 12 = 470 × 10 = 200 × 20 = 130 × 42 = 550 × 10 = 230 × 42 = 149 × 33 = 472 × 20 = 660 × 14 = 540 × 10 = 195 × 36 = 970 × 10 = 60 × 70 = 159 × 54 = 181 × 22 = 103 × 90 = 102 × 96 = 243 × 16 = 410 × 17 = 270 × 23 = 242 × 40 = 552 × 10 = 150 × 56 = 198 × 34 = 180 × 10 = 500 × 20 = 160 × 41 = 214 × 30 = 30 × 80 = 747 × 13 = 100 × 35 = 290 × 14 = 251 × 39 = 630 × 15 = 255 × 12 = 210 × 30 = 114 × 73 = 410 × 20 = 246 × 36 = 160 × 30 = 110 × 81 = 633 × 12 = 105 × 28 =170 × 50 = 645 × 13 = 514 × 16 = 304 × 25 = 90 × 80 = 990 × 10 = 120 × 44 = 198 × 13 = 380 × 10 = 600 × 10 = 390 × 10 = 262 × 10 = 540 × 18 = 631 × 10 = 550 × 16 = 335 × 12 = 123 × 50 = 490 × 15 = 250 × 26 = 898 × 10 = 144 × 30 = 165 × 32 = 314 × 20 = 103 × 43 = 197 × 30 = 241 × 40 = 80 × 20 = 100 × 45 = 162 × 40 = 217 × 10 = 415 × 18 = 239 × 37 = 120 × 70 = 140 × 60 = 688 × 11 = 210 × 13 = 900 × 10 = 235 × 40 = 200 × 40 = 630 × 10 = 100 × 20 = 246 × 30 = 302 × 13 = 130 × 21 = 555 × 12 = 800 × 10 = 210 × 22 = 359 × 25 = 232 × 40 = 660 × 10 = 120 × 35 = 820 × 10 = 132 × 20 = 431 × 10 = 418 × 20 =月日姓名:练习范围：三位数乘两位数题分秒成绩: 数：100210 × 44 = 200 × 20 = 306 × 20 = 290 × 14 = 892 × 10 = 262 × 10 = 500 × 20 = 155 × 48 = 630 × 10 = 152 × 45 = 550 × 10 = 160 × 60 = 338 × 25 = 755 × 10 = 350 × 10 = 431 × 10 = 90 × 60 = 630 × 15 = 275 × 34 = 355 × 19 = 330 × 25 = 200 × 32 = 186 × 30 = 114 × 73 = 626 × 12 = 824 × 10 = 164 × 60 = 400 × 20 = 122 × 75 = 140 × 30 = 359 × 25 = 100 × 20 = 460 × 16 = 200 × 40 = 100 × 84 = 280 × 22 = 175 × 46 = 103 × 90 = 250 × 40 = 565 × 10 = 246 × 30 = 159 × 57 = 235 × 40 = 400 × 10 = 234 × 15 =414 × 16 = 148 × 34 = 700 × 10 = 199 × 26 = 109 × 50 = 100 × 60 = 528 × 17 = 150 × 42 = 227 × 30 = 333 × 30 = 120 × 44 = 198 × 13 = 180 × 11 = 280 × 12 = 552 × 10 = 408 × 10 = 132 × 20 = 198 × 34 = 107 × 20 = 732 × 10 = 290 × 31 = 212 × 35 = 157 × 40 = 450 × 20 = 220 × 18 = 820 × 10 = 540 × 10 = 170 × 28 = 880 × 10 = 80 × 20 = 898 × 10 = 660 × 10 = 239 × 37 = 110 × 70 = 390 × 13 = 186 × 26 = 336 × 10 = 548 × 10 = 243 × 16 = 430 × 22 = 500 × 10 = 410 × 17 = 40 × 40 = 330 × 24 = 218 × 10 = 900 × 10 = 100 × 35 = 200 × 35 = 104 × 95 = 310 × 28 = 140 × 31 = 322 × 30 = 20 × 90 = 550 × 16 = 150 × 40 =月日姓名:练习范围：三位数乘两位数题分秒成绩: 数：100120 × 44 = 219 × 30 = 125 × 70 = 565 × 10 = 162 × 40 = 239 × 37 = 540 × 10 = 184 × 26 = 390 × 10 = 108 × 92 = 178 × 35 = 125 × 78 = 520 × 10 = 140 × 31 = 200 × 20 = 165 × 20 = 305 × 30 = 262 × 10 = 100 × 10 = 230 × 38 = 328 × 19 = 108 × 10 = 552 × 10 = 880 × 10 = 110 × 70 = 180 × 20 = 200 × 12 = 144 × 45 = 146 × 60 = 220 × 21 = 320 × 11 = 165 × 32 = 195 × 36 = 180 × 10 = 130 × 42 = 270 × 23 = 114 × 73 = 200 × 40 = 290 × 16 = 455 × 10 = 160 × 30 = 100 × 80 = 633 × 12 = 171 × 30 = 217 × 10 =760 × 10 = 100 × 84 = 355 × 19 = 164 × 19 = 214 × 30 = 103 × 90 = 310 × 28 = 224 × 30 = 892 × 10 = 280 × 30 = 246 × 30 = 730 × 10 = 200 × 30 = 430 × 11 = 198 × 13 = 108 × 30 = 500 × 14 = 898 × 10 = 200 × 50 = 120 × 83 = 336 × 10 = 470 × 12 = 190 × 48 = 300 × 29 = 953 × 10 = 149 × 33 = 443 × 13 = 190 × 30 = 110 × 42 = 199 × 26 = 500 × 20 = 300 × 10 = 600 × 10 = 148 × 44 = 243 × 16 = 320 × 23 = 660 × 14 = 642 × 13 = 380 × 10 = 102 × 70 = 140 × 30 = 123 × 50 = 330 × 24 = 304 × 25 = 160 × 23 = 265 × 14 = 10 × 40 = 431 × 10 = 250 × 40 = 250 × 11 = 150 × 40 = 180 × 11 = 231 × 19 = 135 × 68 = 400 × 20 =月日姓名:练习范围：三位数乘两位数题分秒成绩: 数：100120 × 60 = 410 × 20 = 550 × 16 = 830 × 10 = 224 × 28 = 390 × 13 = 250 × 40 = 160 × 30 = 174 × 25 = 262 × 10 = 210 × 44 = 688 × 11 = 40 × 70 = 198 × 34 = 587 × 12 = 670 × 11 = 255 × 30 = 562 × 10 = 160 × 41 = 245 × 36 = 500 × 14 = 800 × 10 = 280 × 12 = 135 × 26 = 103 × 90 = 330 × 24 = 150 × 50 = 631 × 10 = 40 × 20 = 400 × 14 = 990 × 10 = 349 × 26 = 100 × 90 = 180 × 20 = 465 × 12 = 168 × 10 = 125 × 70 = 110 × 70 = 175 × 46 = 165 × 32 = 158 × 60 = 152 × 40 = 633 × 12 = 280 × 30 = 335 × 12 =210 × 20 = 552 × 10 = 390 × 10 = 100 × 70 = 140 × 60 = 150 × 40 = 142 × 70 = 223 × 10 = 110 × 20 = 100 × 35 = 244 × 30 = 272 × 20 = 200 × 30 = 930 × 10 = 892 × 10 = 755 × 10 = 875 × 10 = 270 × 13 = 200 × 50 = 130 × 21 = 123 × 50 = 140 × 61 = 100 × 30 = 408 × 10 = 184 × 26 = 106 × 10 = 630 × 10 = 360 × 20 = 40 × 40 = 220 × 44 = 186 × 13 = 380 × 10 = 474 × 15 = 214 × 30 = 587 × 15 = 199 × 26 = 218 × 10 = 470 × 12 = 472 × 20 = 170 × 34 = 160 × 11 = 711 × 10 = 120 × 64 = 336 × 10 = 180 × 10 = 565 × 10 = 235 × 40 = 540 × 10 = 550 × 10 = 310 × 28 = 110 × 14 = 10 × 60 = 165 × 20 = 374 × 20 = 130 × 16 =月日姓名:练习范围：三位数乘两位数题分秒成绩: 数：100120 × 44 = 160 × 60 = 160 × 23 = 160 × 10 = 300 × 30 = 250 × 40 = 640 × 10 = 930 × 10 = 120 × 83 = 165 × 10 = 123 × 50 = 990 × 10 = 305 × 27 = 331 × 30 = 139 × 50 = 300 × 10 = 330 × 24 = 180 × 10 = 125 × 76 = 495 × 16 = 103 × 90 = 200 × 30 = 300 × 20 = 200 × 40 = 199 × 26 = 239 × 37 = 400 × 10 = 355 × 19 = 290 × 14 = 825 × 10 = 898 × 10 = 246 × 30 = 477 × 16 = 300 × 22 = 120 × 53 = 113 × 45 = 336 × 10 = 755 × 10 = 50 × 60 = 118 × 60 = 344 × 12 = 40 × 50 = 400 × 20 = 200 × 50 = 328 × 10 =390 × 10 = 848 × 10 = 175 × 46 = 472 × 20 = 60 × 70 = 140 × 31 = 431 × 10 = 384 × 10 = 217 × 10 = 408 × 10 = 214 × 30 = 265 × 18 = 410 × 20 = 90 × 10 = 688 × 11 = 110 × 11 = 114 × 73 = 133 × 27 = 380 × 10 = 160 × 30 = 200 × 20 = 235 × 40 = 198 × 34 = 290 × 21 = 210 × 44 = 165 × 32 = 100 × 68 = 470 × 12 = 101 × 46 = 660 × 14 = 120 × 66 = 180 × 11 = 630 × 12 = 444 × 20 = 450 × 10 = 110 × 60 = 800 × 10 = 565 × 10 = 545 × 15 = 50 × 10 = 552 × 10 = 184 × 26 = 100 × 80 = 100 × 84 = 650 × 15 = 150 × 10 = 190 × 10 = 165 × 20 = 125 × 70 = 400 × 14 = 162 × 40 = 953 × 10 = 147 × 46 = 188 × 50 = 600 × 10 =月日姓名:练习范围：三位数乘两位数题分秒成绩: 数：100164 × 20 = 40 × 40 = 200 × 10 = 249 × 20 = 214 × 30 = 100 × 84 = 350 × 24 = 160 × 30 = 120 × 64 = 100 × 35 = 227 × 22 = 470 × 17 = 390 × 10 = 120 × 83 = 184 × 26 = 280 × 13 = 100 × 80 = 100 × 20 = 450 × 17 = 20 × 50 = 180 × 40 = 160 × 36 = 100 × 50 = 164 × 55 = 335 × 12 = 160 × 33 = 165 × 20 = 224 × 28 = 455 × 10 = 148 × 50 = 180 × 11 = 260 × 10 = 181 × 47 = 310 × 28 = 120 × 53 = 900 × 10 = 280 × 12 = 158 × 60 = 115 × 14 = 199 × 26 = 130 × 21 = 600 × 10 = 158 × 55 = 460 × 16 = 129 × 50 =102 × 80 = 270 × 23 = 410 × 20 = 390 × 13 = 500 × 20 = 210 × 27 = 380 × 12 = 228 × 20 = 175 × 46 = 140 × 60 = 359 × 25 = 410 × 17 = 700 × 10 = 370 × 23 = 130 × 37 = 239 × 10 = 475 × 17 = 149 × 33 = 177 × 10 = 215 × 12 = 360 × 26 = 240 × 24 = 198 × 13 = 100 × 60 = 100 × 97 = 336 × 10 = 990 × 10 = 239 × 37 = 246 × 20 = 100 × 10 = 630 × 15 = 330 × 24 = 123 × 50 = 246 × 36 = 110 × 86 = 432 × 15 = 312 × 23 = 395 × 20 = 165 × 32 = 578 × 10 = 633 × 12 = 125 × 70 = 140 × 40 = 120 × 40 = 20 × 60 = 150 × 40 = 246 × 30 = 304 × 25 = 300 × 10 = 180 × 30 = 162 × 40 = 172 × 30 = 484 × 15 = 630 × 10 = 196 × 50 =月日姓名:练习范围：三位数乘两位数题分秒成绩: 数：100648 × 10 = 362 × 15 = 880 × 10 = 132 × 20 = 160 × 30 = 304 × 25 = 630 × 15 = 431 × 10 = 130 × 54 = 100 × 80 = 110 × 78 = 190 × 15 = 184 × 26 = 410 × 20 = 129 × 50 = 162 × 40 = 183 × 50 = 647 × 10 = 280 × 30 = 755 × 10 = 800 × 10 = 935 × 10 = 550 × 10 = 114 × 73 = 565 × 10 = 105 × 48 = 310 × 30 = 140 × 31 = 110 × 10 = 330 × 24 = 500 × 20 = 246 × 30 = 410 × 17 = 175 × 35 = 120 × 62 = 100 × 20 = 440 × 12 = 390 × 13 = 640 × 11 = 210 × 36 = 248 × 25 = 218 × 10 = 472 × 20 = 230 × 10 = 224 × 28 =248 × 20 = 120 × 60 = 198 × 13 = 450 × 20 = 540 × 10 = 688 × 11 = 598 × 10 = 336 × 10 = 250 × 40 = 168 × 41 = 155 × 10 = 820 × 10 = 80 × 10 = 10 × 30 = 660 × 14 = 105 × 82 = 303 × 29 = 630 × 10 = 160 × 23 = 134 × 50 = 110 × 70 = 195 × 36 = 408 × 10 = 214 × 30 = 990 × 10 = 900 × 10 = 100 × 30 = 240 × 30 = 330 × 10 = 953 × 10 = 100 × 25 = 355 × 19 = 130 × 20 = 350 × 15 = 200 × 10 = 125 × 70 = 246 × 36 = 400 × 14 = 120 × 44 = 631 × 10 = 300 × 20 = 130 × 69 = 540 × 14 = 380 × 17 = 100 × 32 = 152 × 60 = 260 × 20 = 143 × 68 = 180 × 10 = 370 × 18 = 100 × 84 = 175 × 46 = 840 × 10 = 174 × 36 = 217 × 10 =月日姓名:练习范围：三位数乘两位数题分秒成绩: 数：100400 × 10 = 140 × 31 = 146 × 65 = 180 × 11 = 330 × 24 = 140 × 60 = 770 × 12 = 160 × 60 = 300 × 28 = 100 × 70 = 134 × 50 = 400 × 13 = 200 × 10 = 400 × 14 = 498 × 15 = 160 × 30 = 100 × 20 = 842 × 10 = 304 × 25 = 130 × 32 = 228 × 40 = 820 × 10 = 431 × 10 = 220 × 30 = 454 × 20 = 224 × 28 = 199 × 26 = 40 × 40 = 688 × 11 = 235 × 40 = 310 × 30 = 654 × 15 = 258 × 20 = 120 × 83 = 110 × 30 = 930 × 10 = 110 × 34 = 359 × 25 = 130 × 21 = 892 × 10 = 120 × 44 = 470 × 12 = 150 × 18 = 286 × 30 = 267 × 13 =。

三位数乘两位数口算题四年级一、口算题。

1. 120×20 =2. 130×30 =3. 140×20 =4. 210×30 =5. 230×20 =6. 320×30 =7. 310×20 =8. 410×20 =9. 420×30 =10. 150×40 =11. 160×30 =12. 250×20 =13. 260×30 =14. 350×20 =15. 360×20 =16. 450×20 =17. 460×30 =18. 510×20 =19. 520×30 =20. 530×20 =二、解析。

1. 对于120×20：- 先计算12×2 = 24，然后因为因数末尾共有2个0，所以在24后面添上2个0，结果为2400。

2. 对于130×30：- 计算13×3 = 39，因数末尾共有2个0，就在39后面添2个0，得到3900。

3. 对于140×20：- 先算14×2 = 28，再添2个0，结果是2800。

4. 对于210×30：- 计算21×3 = 63，然后添2个0，为6300。

5. 对于230×20：- 先算23×2 = 46，添2个0后得4600。

6. 对于320×30：- 计算32×3 = 96，添2个0得到9600。

7. 对于310×20：- 先算31×2 = 62，添2个0为6200。

8. 对于410×20：9. 对于420×30：- 先算42×3 = 126，添2个0结果是12600。

10. 对于150×40：- 计算15×4 = 60，添2个0得到6000。