题目内容
解方程.
6+
x=10
x+
x=12
25%+x=75
x÷
=
.
6+
| 7 |
| 10 |
x+
| 3 |
| 5 |
25%+x=75
x÷
| 5 |
| 8 |
| 5 |
| 4 |
(1)6+
x=10,
6+
x-6=10-6,
x=4,
x×
=4×
,
x=
;
(2)x+
x=12,
x=12,
x×
=12×
,
x=
;
(3)25%+x=75,
0.25+x=75,
0.25+x-0.25=75-0.25,
x=74.75;
(4)x÷
=
,
x÷
×
=
×
,
x=
.
| 7 |
| 10 |
6+
| 7 |
| 10 |
| 7 |
| 10 |
| 7 |
| 10 |
| 10 |
| 7 |
| 10 |
| 7 |
x=
| 40 |
| 7 |
(2)x+
| 3 |
| 5 |
| 8 |
| 5 |
| 8 |
| 5 |
| 5 |
| 8 |
| 5 |
| 8 |
x=
| 15 |
| 2 |
(3)25%+x=75,
0.25+x=75,
0.25+x-0.25=75-0.25,
x=74.75;
(4)x÷
| 5 |
| 8 |
| 5 |
| 4 |
x÷
| 5 |
| 8 |
| 5 |
| 8 |
| 5 |
| 4 |
| 5 |
| 8 |
x=
| 25 |
| 32 |
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