×2= | - = | ÷ = | × = | 5÷ = |
÷2= | × - = | 12÷ + = | × ÷ × = | ( + )×24=. |
解: ×2= , | - = , | ÷ =2, | × = , | 5÷ =12, |
÷2= , | × - =0, | 12÷ + =16 , | × ÷ × = , | ( + )×24=7. |
分析:根据分数加减乘除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 09:58:18分类:小学数学题库
×2= | - = | ÷ = | × = | 5÷ = |
÷2= | × - = | 12÷ + = | × ÷ × = | ( + )×24=. |
解: ×2= , | - = , | ÷ =2, | × = , | 5÷ =12, |
÷2= , | × - =0, | 12÷ + =16 , | × ÷ × = , | ( + )×24=7. |