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)

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/15 22:45:21

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 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 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8/225
2.1/60÷(1/4-1/5+1/3)
=1÷(1/4×60-1/5×60+1/3×60)
=1÷(15-12+20)
=1÷23
=1/23
3.(1/4-1/5+1/3)÷1/60
=1/4×60-1/5×60+1/3×60
=15-12+20
=23
4.(-1/42)÷(1/6-3/14+2/3-2/7)
=-1÷(1/6×42-1/14×42+2/3×42-2/7×42)
=-1÷(7-3+28-12)
=-1÷20
=-1/20
5.[1又1/24-(3/8+1/6-3/4)×24]÷(-5)
=[1又1/24-(3/8×24+1/6×24-3/4×24)]÷(-5)
=[1又1/24-(9+4-18)]÷(-5)
=[1又1/24+5]÷(-5)
=25/24÷(-5)+5÷(-5)
=-5/24-1
=-1又5/24
6.|-5又1/2|×(1/3-1/2)×3/11÷(1-1/4)
=5又1/2×(-1/6)×3/11÷3/4
=-11/12×3/11÷3/4
=-1/4÷3/4
=-1/3