12× = | 2× = | 1- = | × = |
×5= | 42× = | - = | - = |
+ = | - = |
12× =9 | 2× =![]() | 1- =![]() | × =![]() |
×5=![]() | 42× =9 | - =![]() | + =![]() |
+ =1![]() | - =![]() |
分析:整数乘以分数,分母不变,分子直接相乘.不同分母的分数相加减,先通分,再加减.
点评:此题考查了分数的四则混合运算.
编辑:chaxungu时间:2026-04-27 08:32:12分类:小学数学题库
12× = | 2× = | 1- = | × = |
×5= | 42× = | - = | - = |
+ = | - = |
12× =9 | 2× =![]() | 1- =![]() | × =![]() |
×5=![]() | 42× =9 | - =![]() | + =![]() |
+ =1![]() | - =![]() |