解比例
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| (1)0.5:0.8=x:14 0.8x=0.5×14 0.8x÷0.8=7÷0.8 x=8.75; (2)
25x=75×1.2 25x÷25=90÷25 x=3.6; (3)x:10%=3:
x=
(4)
x=45; (5)1.5:x=0.2:44 0.2x=1.5×44 0.2x÷0.2=66÷0.2 x=330; (6)x:0.5=
4x=0.5×
4x÷4=
x=
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(2)
=
(3)x:6=0.7:0.28(4)20:3=50:x
