+ = | + = | - = | 0.25×8= | 0.9×0.2= |
- = | + = | 10- = | 1.25×(0.8+0.08)= | 0.25×3.2= |
+ =1, | + = , | - = , | 0.25×8=2, | 0.9×0.2=0.18, |
- = , | + = , | 10- =9 , | 1.25×(0.8+0.08)=1.1, | 0.25×3.2=0.8. |
分析:根据分数和小数加减乘除是计算方法进行计算即可.
点评:口算时,注意运算符号和数据,然后再进一步计算即可.
编辑:chaxungu时间:2026-04-27 07:52:07分类:小学数学题库
+ = | + = | - = | 0.25×8= | 0.9×0.2= |
- = | + = | 10- = | 1.25×(0.8+0.08)= | 0.25×3.2= |
+ =1, | + = , | - = , | 0.25×8=2, | 0.9×0.2=0.18, |
- = , | + = , | 10- =9 , | 1.25×(0.8+0.08)=1.1, | 0.25×3.2=0.8. |