1.(-81又18/25)÷20又1/4 2.1/60÷(1/4-1/5+1/3) 3.(1/4-1/5+1/3)÷1/60 4.(-1/42)÷(1/6-3/14+2/3-2/7)5.[1又1/24-(3/8+1/6-3/4)×24]÷(-5) 6.|-5又1/2|×(1/3-1/2)×3/11÷(1-1/4)

问题描述:

1.(-81又18/25)÷20又1/4 2.1/60÷(1/4-1/5+1/3)
3.(1/4-1/5+1/3)÷1/60 4.(-1/42)÷(1/6-3/14+2/3-2/7)
5.[1又1/24-(3/8+1/6-3/4)×24]÷(-5) 6.|-5又1/2|×(1/3-1/2)×3/11÷(1-1/4)

1.(-81又18/25)÷20又1/4 =-81又18/25÷81/4=-81÷81/4-18/25÷81/4=-4-8/225=-4又8/2252.1/60÷(1/4-1/5+1/3) =1÷(1/4×60-1/5×60+1/3×60)=1÷(15-12+20)=1÷23=1/233.(1/4-1/5+1/3)÷1/60 =1/4×60-1/5×6...