题目内容
求未知数.
120+
x=168
x-
x=9.45
=0.12:1.5.
120+
| 5 |
| 9 |
x-
| 1 |
| 8 |
| 6.4 |
| x |
(1)120+
x=168,
120+
x-120=168-120,
x×
=48×
,
x=86.4.
(2)x-
x=9.45,
x=9.45,
x×
=9.45×
,
x=10.8;
(3)
=0.12:1.5,
0.12x=6.4×1.5,
0.12x÷0.12=9.6÷0.12,
x=80.
| 5 |
| 9 |
120+
| 5 |
| 9 |
| 5 |
| 9 |
| 9 |
| 5 |
| 9 |
| 5 |
x=86.4.
(2)x-
| 1 |
| 8 |
| 7 |
| 8 |
| 7 |
| 8 |
| 8 |
| 7 |
| 8 |
| 7 |
x=10.8;
(3)
| 6.4 |
| x |
0.12x=6.4×1.5,
0.12x÷0.12=9.6÷0.12,
x=80.
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