+ = | × = | +120= |
×120= | × = | 40-2 = |
× = | + - = |
+ = , | × = , | +120=120 , |
×120= , | × = , | 40-2 =37 , |
× = , | + - = . |
分析:根据分数加减法的计算法则以及分数乘法的计算法则进行计算即可.
点评:本题属于基本的计算,在平时都积累经验,逐步提高运算的速度和准确性.
编辑:chaxungu时间:2026-04-27 11:04:16分类:小学数学题库
+ = | × = | +120= |
×120= | × = | 40-2 = |
× = | + - = |
+ = , | × = , | +120=120 , |
×120= , | × = , | 40-2 =37 , |
× = , | + - = . |