= | 7-2 = | 1 +0.8= | 1.2- = |
1.7- = | 2.75+7 = | 8.25- = | - = |
= , | 7-2 =4.5, | 1 +0.8=2, | 1.2- =0.6, |
1.7- =1.2, | 2.75+7 =10, | 8.25- =7.75, | - = . |
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:2026-04-26 08:26:46分类:小学数学题库
= | 7-2 = | 1 +0.8= | 1.2- = |
1.7- = | 2.75+7 = | 8.25- = | - = |
= , | 7-2 =4.5, | 1 +0.8=2, | 1.2- =0.6, |
1.7- =1.2, | 2.75+7 =10, | 8.25- =7.75, | - = . |