+ = | - = | - = | 5- = | 1- - = |
| 5÷0.001= | 2.5×4= | + = | - = | + + = |
+ = , | - = , | - = , | 5- =4.75, | 1- - =0, |
| 5÷0.001=5000, | 2.5×4=10, | + = , | - = , | + + =1 . |
分析:根据分数和小数加减乘除法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 09:49:06分类:小学数学题库
+ = | - = | - = | 5- = | 1- - = |
| 5÷0.001= | 2.5×4= | + = | - = | + + = |
+ = , | - = , | - = , | 5- =4.75, | 1- - =0, |
| 5÷0.001=5000, | 2.5×4=10, | + = , | - = , | + + =1 . |