[17/15-(5/8—1/6+7/12)×24]÷(-5) 3/2×5/7-(-5/7)×5/2+(-1/2)÷7/5
来源:学生作业帮 编辑:百度作业网作业帮 分类:数学作业 时间:2024/08/10 23:44:25
[17/15-(5/8—1/6+7/12)×24]÷(-5) 3/2×5/7-(-5/7)×5/2+(-1/2)÷7/5
[17/15-(5/8—1/6+7/12)×24]÷(-5)
=[17/15-(5/8×24—1/6×24+7/12×24)]÷(-5)
=[17/15-(15-4+14)]÷(-5)
=[17/15-25]÷(-5)
=-17/15×1/5+25×1/5
=-17/75+5
=4又58/75
3/2×5/7-(-5/7)×5/2+(-1/2)÷7/5
=3/2×5/7-(-5/7)×5/2+(-1/2)×5/7
=(3/2-5/2-1/2)×5/7
=-3/2×5/7
=-15/14
=[17/15-(5/8×24—1/6×24+7/12×24)]÷(-5)
=[17/15-(15-4+14)]÷(-5)
=[17/15-25]÷(-5)
=-17/15×1/5+25×1/5
=-17/75+5
=4又58/75
3/2×5/7-(-5/7)×5/2+(-1/2)÷7/5
=3/2×5/7-(-5/7)×5/2+(-1/2)×5/7
=(3/2-5/2-1/2)×5/7
=-3/2×5/7
=-15/14
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