| 直接写出答案 9.7-8= | 3-0.5= | 2 +0.4= |
+ = | - = | 2.5-2 |
1 +0.8= | + = | 0.625+ = |
1 -1 = |
| 解:9.7-8=1.7, | 3-0.5=2.5, | 2 +0.4=2.56, |
+ = , | - = , | 2.5-2 = , |
1 +0.8=2, | + =1, | 0.625+ =1, |
1 -1 =0. |
分析:根据小数和分数加减乘除的计算方法进行计算.
点评:口算时,注意运算符号和数据,然后再进一步计算.
编辑:chaxungu时间:2026-04-27 08:40:10分类:小学数学题库
| 直接写出答案 9.7-8= | 3-0.5= | 2 +0.4= |
+ = | - = | 2.5-2 |
1 +0.8= | + = | 0.625+ = |
1 -1 = |
| 解:9.7-8=1.7, | 3-0.5=2.5, | 2 +0.4=2.56, |
+ = , | - = , | 2.5-2 = , |
1 +0.8=2, | + =1, | 0.625+ =1, |
1 -1 =0. |