+ = | 1- = | 1÷ = | - = |
× = | 0÷ = | 0.9+99×0.9= | ( + )×12= |
| 38+0.625= | 35÷0.7= | 0.52= | 9π= |
+ = , | 1- = , | 1÷ = , | - = , |
× = , | 0÷ =0, | 0.9+99×0.9=90, | ( + )×12=13, |
| 38+0.625=38.625, | 35÷0.7=50, | 0.52=0.25, | 9π=28.26. |
分析:根据分数和小数加减乘除的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:2026-04-26 08:15:19分类:小学数学题库
+ = | 1- = | 1÷ = | - = |
× = | 0÷ = | 0.9+99×0.9= | ( + )×12= |
| 38+0.625= | 35÷0.7= | 0.52= | 9π= |
+ = , | 1- = , | 1÷ = , | - = , |
× = , | 0÷ =0, | 0.9+99×0.9=90, | ( + )×12=13, |
| 38+0.625=38.625, | 35÷0.7=50, | 0.52=0.25, | 9π=28.26. |