2.用小棒或计算器做一做,算一算。
27 + 24 =
5315 + 15 =
50
69 –11 =
5388 + 62 =
100
3.用竖式计算。
26+7= 3318+27=
26+27=
26 + 17
33
26 + 217
53
5318+47=
18 + 21 7
45
18 + 417
65
435+39=
42
6253+39=
• 14、Thank you very much for taking me with you on that splendid outing to London. It was the first time that I had seen the Tower or any of the other famous sights. If I'd gone alone, I couldn't have seen nearly as much, because I wouldn't have known my way about.
• 17、一个人如果不到最高峰,他就没有片刻的安宁,他也就不会感到生命的恬静和光荣。2021/1/132021/1/132021/1/132021/1/13
谢谢观看
进位加法要牢记,相同数位要对齐;先从个位加 起来,个位满十要进一。
3.算一算,说一说。
37+24= 61 37
+ 214 61
46+54= 100
46 + 514
10 0
三、巩固练习 1.估一估,哪两袋珠子合起来够穿一条项链?