Question

1.35×1.2+13.5×0.13+3.55×7.5的简便运算？

Answer 1

简便计算过程

=1.35×1.2+1.35×1.3+3.55×7.5

=1.35×(1.2+1.3)+3.55×7.5

=1.35×2.5+3.55×7.5

=0.45×7.5+3.55×7.5

=(0.45+3.55)×7.5

=4×7.5

=30

Answer 2

35×1.2+13.5×0.13，+3.55×7.5，计算这道题的时候，先把中间的13.5×0.13变成1.35×1.3。这和前面的1.35×1.2才运。乘法结合率的形式变成1.35乘以1.2与1.3的和，也就是说变成了1.35×2.5。然后再和后面的进行计算，这样比较简便一些。

Answer 3

因为1.35×1.2=13.5×0.12，所以前面两个乘式中都有13.5，运用乘法分配律逆运算就是有13.5×（0.12+0.13）+3.55×7.5=13.5×0.25+3.55×30×0.25=（13.5+106.5）×0.25=30

Answer 4

原式=13.5(0.12+0.13)+3.55x7.5
=13.5x0.25+3.55x7.5
=13.5*0.25+3.55*3*2.5
=0.25(13.5+35.5*3)
=0.25(l3.5+106.5)=0.25*120
=30

Answer 5

=1.35×1.2+1.35×1.3+3.55×7.5
=1.35×(1.2+1.3)+3.55×7.5
=1.35×2.5+3.55×7.5
=0.45×7.5+3.55×7.5
=（0.45+3.55）×7.5
=4×7.5
=30