计算,能简算的要简算;3*(2/3+1/12)-1/4 {1-(1/7+4/21)}\4/15
问题描述:
计算,能简算的要简算;3*(2/3+1/12)-1/4 {1-(1/7+4/21)}\4/15
答
=2+1/4-15/16【1-(3+4)/21】
=2+1/4-15/16*2*3
=2+1/4-5/8
=(16+2-5)/8
=13/8