Question

7.82÷2.3-0.54÷1.2怎样简便计算？

Answer 1

7.82÷2.3-0.54÷1.2
=7.82÷（2+0.3）-0.54÷（1+0.2）
=7.82÷2+7.82÷0.3-0.54÷1-0.54÷0.2
=3.91+26.07-0.54-2.7
=26.74

Answer 2

该题要先约分，再按四则运算计算即可。
具体做法：
7.82÷2.3-0.54÷1.2
=2.3×3.4÷2.3-0.6×0.9÷(0.3×4)
=3.4-0.9÷2
=3.4-0.45
=3.4-0.4-0.05
=3.0-0.05
=2.95
希望对你有所帮助！

Answer 3

7.82÷2.3一0.54÷1.2
=78.2÷23一0.54÷6÷0.2
=2.4一0.09÷0.2
=2.4一0.45
=2.4一0.4一0.05
=2一0.05
=1.95

Answer 4

这道题看看就没有简便方法。不过可以每个数都乘以10，这样做能简单一点儿。
还是要从头算起
7.82÷2.3-0.54÷1.2
=78.2÷23-5.4÷12
=3.4-0.45
=2.95

Answer 5

7.82÷2.3-0.54÷1.2
=3.4-0.45
=2.95