题目内容
解方程
(1)7.2x÷2=4.32
(2)
=x÷0.3
(3)x:1.2=3:4.
(1)7.2x÷2=4.32
(2)
| 16 |
| 2.4 |
(3)x:1.2=3:4.
(1)7.2x÷2=4.32,
7.2x÷2×2=4.32×2,
7.2x=8.64,
7.2x÷7.2=8.64÷7.2,
x=1.2;
(2)
=x÷0.3,
=
,
2.4x=16×0.3,
2.4x=4.8,
2.4x÷2.4=4.8÷2.4,
x=2;
(3)x:1.2=3:4,
4x=1.2×3,
4x÷4=3.6÷4,
x=0.9.
7.2x÷2×2=4.32×2,
7.2x=8.64,
7.2x÷7.2=8.64÷7.2,
x=1.2;
(2)
| 16 |
| 2.4 |
| 16 |
| 2.4 |
| x |
| 0.3 |
2.4x=16×0.3,
2.4x=4.8,
2.4x÷2.4=4.8÷2.4,
x=2;
(3)x:1.2=3:4,
4x=1.2×3,
4x÷4=3.6÷4,
x=0.9.
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