Question

1.25×67.8+125×0.27+12.5×0.52怎么简便运算？

Answer 1

=125×0.678+125×0.27+125×0.052
=125×（0.678+0.27+0.052）
=125×1=125
解法分析：提取公因数，利用乘法分配律逆用，按照四则运算法则进行运算，有括号先算括号里面的，同级运算按顺序计算，不同级运算先算高级运算，所以就可以很快得出结果。

Answer 2

将1.25、125变换成12.5，然后提取公因数12.5
1.25×67.8+125×0.27+12.5×0.52
=12.5×6.78+12.5×2.7+12.5×0.52
=12.5×(6.78+2.7+0.52)
=12.5×10
=125

Answer 3

=12.5×6.78+12.5×2.7+12.5×0.52
=12.5×（6.78+2.7+0.52）
=125
两个数相乘，一个扩大十倍，一个缩小十倍结果相同。

Answer 4

1.25×67.8+125×0.27+12.5×0.52
=1.25×67.8+1.25×27+1.25×5.2
=1.25×（67.8+27+5.2）
=1.25×100
=125
望采纳，谢谢！

Answer 5

原式可以写为=1.25*67.8+1.25*27+1.25*5.2=1.25*(67.8+5.2+27)=1.25*100=125