| 口算. 24×75%= | 5.2÷1.3= | = |
× = | 3÷ = | 3.1-0.3= |
| 0.92= | 4.2+ ÷0.5= | = |
= |
| 24×75%=18, | 5.2÷1.3=4, | = , |
× = , | 3÷ =4, | 3.1-0.3=2.8, |
| 0.92=0.81, | 4.2+ ÷0.5=5.2, | =1 , |
= . |
分析:根据小数和分数加减乘除的计算方法进行计算.
、
根据加法交换律进行简算.点评:口算时,注意运算符号和数据,然后再进一步计算.
编辑:chaxungu时间:2026-04-27 11:41:48分类:小学数学题库
| 口算. 24×75%= | 5.2÷1.3= | = |
× = | 3÷ = | 3.1-0.3= |
| 0.92= | 4.2+ ÷0.5= | = |
= |
| 24×75%=18, | 5.2÷1.3=4, | = , |
× = , | 3÷ =4, | 3.1-0.3=2.8, |
| 0.92=0.81, | 4.2+ ÷0.5=5.2, | =1 , |
= . |
、
根据加法交换律进行简算.