用简便方法计算 2/5×16 101×3/4--3/4 5/6×30×7/15
问题描述:
用简便方法计算 2/5×16 101×3/4--3/4 5/6×30×7/15
答
2/5×16
=0.4×16
=6.4
101×3/4--3/4
=(101-1)×3/4
=100×3/4
=75
5/6×30×7/15
=5/6×14
=35/3那2/15×16呢2/15×16=32/15直接算,没简便方法