+ = | - = | 1- = | + = | -0.25= |
+ = | 3- = | - + = | 1- -0.5= | 12.5×8= |
+ =1, | - = , | 1- = , | + =2, | -0.25=0.5, |
+ = , | 3- =2 , | - + = , | 1- -0.5=0, | 12.5×8=100. |
分析:根据分数和小数加减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:2026-04-27 07:24:49分类:小学数学题库
+ = | - = | 1- = | + = | -0.25= |
+ = | 3- = | - + = | 1- -0.5= | 12.5×8= |
+ =1, | - = , | 1- = , | + =2, | -0.25=0.5, |
+ = , | 3- =2 , | - + = , | 1- -0.5=0, | 12.5×8=100. |