Question

十六分之七乘以十五分之三加十五分之九乘以十六分之三怎么简便运算？

Answer 1

解:

7/16x3/15+9/15x3/16

=7/15x3/16+9/15x3/16

=(7/15+9/15)x3/16

=16/15x3/16

=3/15

=1/5

方洞腔段法:

转化后纳誉利圆竖用乘法分配律实现简便计算。

Answer 2

=7/16x3/15+9/15x3/16
=7/16x3/橡型15+3/15x9/16
=3/15x（7/渗如碧16+9/16）
=1/5x1
=1/丛举5

Answer 3

7/16x3/15+9/15x3/16
=7/15x3/16+9/15x3/16
=(7/15+9/悔此袭巧15)x3/16
=16/碧禅迅15x3/16
=1/5。

Answer 4

7/老物16*3/悉埋15+9/15*3/16＝3/睁含蚂16*7/15+9/15*3/16＝3/16*（7/15+9/15）＝3/16*16/15＝3/15＝1/5