题目内容
解方程或比例.
①χ÷
=36
②
χ+
=
③15:7=χ:1.4.
①χ÷
| 3 |
| 4 |
②
| 1 |
| 8 |
| 7 |
| 8 |
| 31 |
| 32 |
③15:7=χ:1.4.
①x÷
=36,
x÷
×
=36×
,
x=27;
②
x+
=
x+
-
=
-
,
x÷
=
÷
,
x=
;
③15:7=x:1.4,
7x=1.4×15,
7x÷7=21÷7,
x=3.
| 3 |
| 4 |
x÷
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
x=27;
②
| 1 |
| 8 |
| 7 |
| 8 |
| 31 |
| 32 |
| 1 |
| 8 |
| 7 |
| 8 |
| 7 |
| 8 |
| 31 |
| 32 |
| 7 |
| 8 |
| 1 |
| 8 |
| 1 |
| 8 |
| 3 |
| 32 |
| 1 |
| 8 |
x=
| 3 |
| 4 |
③15:7=x:1.4,
7x=1.4×15,
7x÷7=21÷7,
x=3.
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