Question

用简便方法计算。

Answer 1

4.05+37.85
=41.9（此题直加就简便）
6.1x3.6+3.6x3.9
=（6.1+3.9）x3.6
=10x3.6
=36

Answer 2

6.1×3.6+3.6×3.9
＝3.6×（6.1+3.9）
＝3.6×10
＝36