3÷ = | ×15= | 2- = | 1+2%= | + × = |
÷ = | 5÷ = | ×75% | ×4× = | ×99+99× = |
3÷ =7, | ×15=9, | 2- =1 , | 1+2%=1.02, | + × = , |
÷ = , | 5÷ = , | ×75%=1, | ×4× =4, | ×99+99× =99. |
分析:
+
×
先算乘法,再算加法;
×4×
运用乘法交换律简算;
×99+99×
运用乘法分配律简算;其它题目根据运算法则直接求解.
点评:口算题目要求快速准确,能运用简算方法的要简算.
编辑:chaxungu时间:2026-04-27 09:39:21分类:小学数学题库
3÷ = | ×15= | 2- = | 1+2%= | + × = |
÷ = | 5÷ = | ×75% | ×4× = | ×99+99× = |
3÷ =7, | ×15=9, | 2- =1 , | 1+2%=1.02, | + × = , |
÷ = , | 5÷ = , | ×75%=1, | ×4× =4, | ×99+99× =99. |
+
×
先算乘法,再算加法;
×4×
运用乘法交换律简算;
×99+99×
运用乘法分配律简算;上一篇:030030003-是循环小数.
下一篇:返回列表