15x37简便方法

1、37简便方法：

=5 x 3 x 37

=3 x 37 x 5

=111 x 5

=555

2、37简便方法:

=(10 + 5) x 37

=10 x 37 + 5x37

=370 + 185

=555

3、37简便方法:

=(20 - 5) x 37

=20 x 37 - 5 x 37

=740 - 185

=555

4、37简便方法:

=15 x ( 40 - 3)

=15 x 40 - 15 x3

=600 - 45

=555

5、37简便方法:

=15 x (30 + 7)

=15 x 30 + 15 x 7

=450 + 105

=555