题目内容
解比例.
=
80:30=24:X
1.25:0.25=X:1.6.
| 0.7 |
| X |
| 14 |
| 5 |
80:30=24:X
1.25:0.25=X:1.6.
(1)
=
,
14x=0.7×5,
14x÷14=3.5÷14,
x=0.25;
(2)80:30=24:X,
80x=30×24,
80x÷80=720÷80,
x=9;
(3)1.25:0.25=X:1.6,
0.25x=1.25×1.6,
0.25x÷0.25=2÷0.25,
x=8.
| 0.7 |
| x |
| 14 |
| 5 |
14x=0.7×5,
14x÷14=3.5÷14,
x=0.25;
(2)80:30=24:X,
80x=30×24,
80x÷80=720÷80,
x=9;
(3)1.25:0.25=X:1.6,
0.25x=1.25×1.6,
0.25x÷0.25=2÷0.25,
x=8.
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