题目内容
8.1÷0.3= | 3.2÷0.01= | 6.8×0.5= | 7.2÷0.25÷4= |
4.6×9+4.6= | 4.7×0.01= | 1.25×4.3×8= | 8.6-1.48-0.52= |
解:(1)8.1÷0.3=27 | (2)3.2÷0.01=320 | (3)6.8×0.5=3.4 | (4)7.2÷0.25÷4=7.2 |
(5)4.6×9+4.6=46 | (6)4.7×0.01=0.047 | (7)1.25×4.3×8=43 | (8)8.6-1.48-0.52=6.6 |
分析:(1)根据小数除法的计算方法进行计算,
(2)(6)根据小数点移动变化的规律进行计算,
(3)根据小数乘法的计算方法进行计算,
(4)根据一个数连续除以两个数等于除以这两个数的积,进行计算,
(5)根据乘法分配律进行计算,
(7)根据乘法交换律进行计算,
(8)根据一个连续减两个数,等于减去这两个数的和,进行计算.
点评:本题考查了学生在计算中灵活运用简便算法使计算简便的能力.
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