Question

1.53.7*0.37+5.37*6.3

Answer 1

53.7*0.37+5.37*6.3

=5.37*3.7+5.37*6.3 (这步最关键,第一个数缩小十倍,第二个数扩大十倍)

=5.37*(3.7+6.3)

=5.37*10

=53.7