Question

3.2+2.8*0.75最简便方法？

Answer 1

3.2+2.8*0.75
＝3.2+2.8x3／4
＝3.2+（2.8／4）x3
＝3.2+0.7x3
＝3.2+2.1
＝5.3

Answer 2

3.2+2.8×0.75
=3.2+2.8×3/4
=3.2+0.7×3
=3.2+2.1
=5.3