问题
解答题
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答案
(1)1.8:x=7.2:0.8,
7.2x=1.8×0.8,
7.2x÷7.2=1.44÷7.2,
x=0.2;
(2)x+5%x=0.42÷10%,
105%x=4.2,
105%x÷105%=4.2÷105%,
x=4;
(3)32÷x=
÷125%,5 3
32÷x=
,4 3
32÷x×x=
×x,4 3
x÷4 3
=32÷4 3
,4 3
x=24.
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(1)1.8:x=7.2:0.8,
7.2x=1.8×0.8,
7.2x÷7.2=1.44÷7.2,
x=0.2;
(2)x+5%x=0.42÷10%,
105%x=4.2,
105%x÷105%=4.2÷105%,
x=4;
(3)32÷x=
÷125%,5 3
32÷x=
,4 3
32÷x×x=
×x,4 3
x÷4 3
=32÷4 3
,4 3
x=24.