多位数乘一位数-竖式计算(新、选)
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:上册多位数乘一位数——中间或末尾有0的乘法2010-11-16 15:59:00 来源:人气:815 讨论:0条课程解读一、学习目标:1. 在理解算理的基础上,掌握因数末尾有0乘法的简便算法,并能进行简算。
2. 掌握中间有0的多位数乘一位数的乘法计算方法,能正确地进行竖式计算。
3. 掌握因数末尾有零的乘法,竖式计算的简便算法,并能正确的书写竖式。
二、重点、难点:1. 掌握因数末尾有0的多位数乘一位数乘法竖式计算时,先用一位数去乘0前面的数,再看多位数末尾有几个0,就在乘得的数的末尾添写几个0。
2. 理解中间含“0”的多位数乘一位数的乘法计算的算理。
3. 理解0和任何数相乘都得0。
三、考点分析:1. 运用所学的中间或末尾有0的多位数乘一位数的知识解决相关实际问题。
2. 单价×数量=总价3. 工作效率×工作时间=工作总量知识梳理1. 一个因数末尾有0的乘法,可以用简便方法进行计算。
计算时应注意一位数应该与多位数0前面的数字对齐,多位数末尾有几个0,就在积的末尾添几个0。
2. 一个因数中间有0的乘法,计算时要注意不要忘记用一位数去和多位数中间的0相乘,如果个位乘积不满十时,十位要用0来占位。
典型例题方法应用题:思路分析:1)题意分析:本题意在让学生通过计算和观察得出结果。
2)解题思路:本题考查末尾有“0”的多位数乘一位数的简便算法。
末尾有“0”的多位数乘一位数时,把末尾有“0”的多位数当作没有“0”计算,计算得出结果后,再把末尾有“0”的多位数之后的几个“0”加在乘积的末尾。
解答过程:20×3=60 12×4=48 39×5=195200×3=600 120×4=480 390×5=19502000×3=6000 1200×4=4800 3900×5=19500同学们观察之后,可以看出每组题的第一个因数末尾的“0”都是逐渐增加的,第二个因数都是一位数,而积末尾的“0”也随之增加相同的个数。
三年级——多位数乘一位数竖式计算100题(附答案)以下为三年级数学作业,共有100道多位数乘一位数竖式计算题目,附有答案。
277 x 8 = 2216142 x 5 = 710766 x 8 = 6128792 x 4 = 3168262 x 5 = 1310822 x 7 = 5754489 x 8 = 3912400 x 5 = 2000715 x 7 = 5005592 x 7 = 4144474 x 3 = 1422986 x 5 = 4930233 x 8 = 1864388 x 4 = 1552333 x 5 = 1665269 x 2 = 538269 x 2 = 538 (重复了一遍)541 x 7 = 3787284 x 7 = 1988215 x 7 = 1505837 x 6 = 5022357 x 3 = 1071713 x 7 = 4991909 x 3 = 2727379 x 4 = 1516162 x 8 = 1296346 x 3 = 1038120 x 5 = 600946 x 7 = 6622333 x 7 = 2331896 x 5 = 4480543 x 5 = 2715936 x 4 = 3744840 x 8 = 6720972 x 5 = 4860 729 x 7 = 5103 216 x 3 = 648 509 x 3 = 1527 562 x 4 = 2248 620 x 5 = 3100 849 x 8 = 6792 361 x 5 = 1805 298 x 3 = 894 151 x 3 = 453 640 x 5 = 3200 375 x 4 = 1500 355 x 5 = 1775 120 x 3 = 360 197 x 4 = 788 181 x 7 = 1267 830 x 4 = 3320 600 x 4 = 2400 200 x 8 = 1600 497 x 5 = 2485477 x 4 = 1908 538 x 2 = 1076 267 x 3 = 801 131 x 6 = 786 658 x 2 = 1316 589 x 5 = 2945 341 x 3 = 1023 675 x 3 = 2025 615 x 4 = 2460 687 x 4 = 2748 901 x 8 = 7208 873 x 8 = 6984 339 x 8 = 2712 698 x 4 = 2792 962 x 3 = 2886 131 x 2 = 262 611 x 5 = 3055 693 x 3 = 2079 826 x 2 = 1652 616 x 2 = 1232674 x 7 = 4718 628 x 4 = 2512 721 x 2 = 1442 974 x 6 = 5844 742 x 6 = 4452 115 x 2 = 230 285 x 2 = 570 581 x 4 = 2324 413 x 5 = 2065 963 x 3 = 2889 532 x 7 = 3724 870 x 4 = 3480 843 x 3 = 2529 779 x 7 = 5453 445 x 4 = 1780 982 x 4 = 3928 824 x 2 = 1648 518 x 2 = 1036 395 x 5 = 1975 440 x 5 = 2200627 x 7 = 4389204 x 8 = 1632690 x 4 = 2760XXX errors in the given text。
多位数乘以一位数计算题竖式英文回答:When it comes to solving multiplication problems involving a multi-digit number and a single-digit number, we typically use the vertical method, also known as long multiplication. This method allows us to break down the problem into smaller, more manageable steps.To illustrate, let's consider the problem ofmultiplying a three-digit number, such as 456, by a single-digit number, say 7. Here's how we would solve it using the vertical method:First, we start by multiplying the single-digit number (7) by the ones place of the three-digit number (6). This gives us a product of 42. We write down the 2 in the ones place and carry over the 4 to the next step.Next, we multiply the single-digit number (7) by thetens place of the three-digit number (5). This gives us a product of 35. Since we carried over a 4 from the previous step, we add it to the product, resulting in 39. We write down the 9 in the tens place and carry over the 3 to the next step.Finally, we multiply the single-digit number (7) by the hundreds place of the three-digit number (4). This gives us a product of 28. Again, we add the carried-over 3 from the previous step, resulting in 31. We write down the 1 in the hundreds place and the 3 in the thousands place.To find the final product, we combine the results from each step. In this case, the product of 456 and 7 is 3192.Now, let's switch to Chinese to provide a similar explanation.中文回答:对于涉及多位数和一位数的乘法问题,我们通常使用竖式计算方法,也称为长乘法。