Question

三点二乘四点五加三十二乘零点五五减零点三二 怎么用简便方法计算

Answer 1

3.2×4.5＋32×0.55－0.32……… 变一变,就简便.
=3.2×4.5＋3.2×5.5－0.32
=3.2×（4.5＋5.5）－0.32
=3.2×10－0.32
=32－0.32
=31.68