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拖式计算1)7/12x3/5+7/12x2/52)(1/3÷7/6-1/14)x14/153)5/6÷[1-(2/3-1/2)]
题目详情
拖式计算
1)7/12x3/5+7/12x2/5
2)(1/3÷7/6-1/14)x14/15
3)5/6÷[1-(2/3-1/2)]
1)7/12x3/5+7/12x2/5
2)(1/3÷7/6-1/14)x14/15
3)5/6÷[1-(2/3-1/2)]
▼优质解答
答案和解析
1)7/12x3/5+7/12x2/5
=7/12×(3/5+2/5)
=7/12
2)(1/3÷7/6-1/14)x14/15
=(1/3×6/7-1/14)×14/15
=(2/7-1/14)×14/15
=(4/14-1/14)×14/15
=3/14×14/15
=1/5
3)5/6÷[1-(2/3-1/2)]
=5/6÷[1-(4/6-3/6)]
=5/6÷[1-1/6]
=5/6÷(6/6-1/6)
=5/6÷5/6
=1
=7/12×(3/5+2/5)
=7/12
2)(1/3÷7/6-1/14)x14/15
=(1/3×6/7-1/14)×14/15
=(2/7-1/14)×14/15
=(4/14-1/14)×14/15
=3/14×14/15
=1/5
3)5/6÷[1-(2/3-1/2)]
=5/6÷[1-(4/6-3/6)]
=5/6÷[1-1/6]
=5/6÷(6/6-1/6)
=5/6÷5/6
=1
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