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计算能简则简(1)3/4÷7/8÷15/14(2)(4/9+2/15)÷2/15(3)3/20计算能简则简(1)3/4÷7/8÷15/14(2)(4/9+2/15)÷2/15(3)3/20÷0.2x2/3解方程X÷2/9=6/7,3/4x÷1/6=18
题目详情
计算能简则简 (1)3/4÷7/8÷15/14(2)(4/9+2/15)÷2/15(3)3/20
计算能简则简
(1)3/4÷7/8÷15/14(2)(4/9+2/15)÷2/15(3)3/20÷0.2x2/3
解方程
X÷2/9=6/7,3/4x÷1/6=18
计算能简则简
(1)3/4÷7/8÷15/14(2)(4/9+2/15)÷2/15(3)3/20÷0.2x2/3
解方程
X÷2/9=6/7,3/4x÷1/6=18
▼优质解答
答案和解析
计算能简则简
(1)
3/4÷7/8÷15/14
=3/4×8/7×14/15
=(3/4×14/15)×8/7
=7/10×8/7
=4/5
(2)
(4/9+2/15)÷2/15
=(4/9+2/15)×15/2
=4/9×15/2+2/15×15/2
=10/3+1
=13/3
(3)
3/20÷0.2x2/3
=3/20÷1/5×2/3
=3/20×5×2/3
=(3/20×2/3)×5
=1/10×5
=1/2
解方程
X÷2/9=6/7
X=6/7×2/9
X=4/21
3/4x÷1/6=18
3/4X=18×1/6
3/4X=3
X=3÷3/4
X=4
(1)
3/4÷7/8÷15/14
=3/4×8/7×14/15
=(3/4×14/15)×8/7
=7/10×8/7
=4/5
(2)
(4/9+2/15)÷2/15
=(4/9+2/15)×15/2
=4/9×15/2+2/15×15/2
=10/3+1
=13/3
(3)
3/20÷0.2x2/3
=3/20÷1/5×2/3
=3/20×5×2/3
=(3/20×2/3)×5
=1/10×5
=1/2
解方程
X÷2/9=6/7
X=6/7×2/9
X=4/21
3/4x÷1/6=18
3/4X=18×1/6
3/4X=3
X=3÷3/4
X=4
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