计算:0.77×【7/10÷(2/7×5)】=?解比例:3/20:X=9:1

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计算:0.77×【7/10÷(2/7×5)】=?解比例:3/20:X=9:1计算:0.77×【7/10÷(2/7×5)】=?解比例:3/20:X=9:1计算:0.77×【7/10÷(2/7×5)】=?

计算:0.77×【7/10÷(2/7×5)】=?解比例:3/20:X=9:1
计算:0.77×【7/10÷(2/7×5)】=?解比例:3/20:X=9:1

计算:0.77×【7/10÷(2/7×5)】=?解比例:3/20:X=9:1
0.77×【7/10÷(2/7×5)】
=0.77×(7/10÷10/7)
=0.77×(7/10×7/10)
=0.77×0.49
=0.3773
3/20:X=9:1

9X=3/20
X=3/20÷9
X=1/60

(1)由0.77×(7/10÷(2/7×5)
=0.77×(7/10×7/10)
=0.77×49/100
=3773/10000.
(2)3/20:x=9:1
9x=3/20
x=1/60.