数学简算题,一定要简算,500000分5/6+1/2*5/12 15*1/6-4/15
问题描述:
数学简算题,一定要简算,500000分
5/6+1/2*5/12
15*1/6-4/15
答
5/6+1/2×5/12
=5/6+1/4×5/6
=(1+1/4)×5/6
=5/4×5/6
=25/24
15×1/6-4/15
=(15*5-4*2)/30
=67/30
答
5/6+1/2×5/12
=2×5/12+1/2×5/12
=(2+1/2)×5/12
=5/2×5/12
=25/24
=1又1/24
15×1/6-4/15
=2又1/2-4/15
=2+(1/2-4/15)
=2+7/30
=2又7/30