解方程:1/2x+1/8x=25/54 x÷2/7×3/4=12
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/11/11 06:49:14
解方程:1/2x+1/8x=25/54 x÷2/7×3/4=12
1/2x+1/8x=25/54
5/8x=25/24
x=25/24×8/5
x=5/3
x÷2/7×3/4=12
x÷2/7=16
x=16×2/7
x=32/7
再问: 是25/54
再答: 1/2x+1/8x=25/54 5/8x=25/54 x=25/54×8/5 x=20/27 x÷2/7×3/4=12 x÷2/7=16 x=16×2/7 x=32/7
再问: 4/5×2/7÷6/7×5/6 [(3/5-1/3)÷4/5]÷1/8
再答: 4/5×2/7÷6/7×5/6 =(4/5×5/6)×(2/7×7/6) =2/3×1/3 =2/9 [(3/5-1/3)÷4/5]÷1/8 =[4/15÷4/5]÷1/8 =1/3÷1/8 =8/3
5/8x=25/24
x=25/24×8/5
x=5/3
x÷2/7×3/4=12
x÷2/7=16
x=16×2/7
x=32/7
再问: 是25/54
再答: 1/2x+1/8x=25/54 5/8x=25/54 x=25/54×8/5 x=20/27 x÷2/7×3/4=12 x÷2/7=16 x=16×2/7 x=32/7
再问: 4/5×2/7÷6/7×5/6 [(3/5-1/3)÷4/5]÷1/8
再答: 4/5×2/7÷6/7×5/6 =(4/5×5/6)×(2/7×7/6) =2/3×1/3 =2/9 [(3/5-1/3)÷4/5]÷1/8 =[4/15÷4/5]÷1/8 =1/3÷1/8 =8/3
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