1.簡便計算.6/7*5/8+3/8÷7/6

1.簡便計算.6/7*5/8+3/8÷7/6




8.6×2.7+3.5×1.6怎樣簡便計算?


把8.6 2.7 3.5 1.6分別化為分數,分別是
=86/10X27/10+35/10X16/10
=2322/10+1260/10
=3582/10
=358.2