题目内容
解方程:
x+
x=24
x=0.7÷
x÷
=
÷
.
x+
| 1 |
| 3 |
| 1 |
| 5 |
| 1 |
| 2 |
x÷
| 6 |
| 35 |
| 26 |
| 45 |
| 13 |
| 25 |
分析:(1)先化简,再根据等式的性质,在方程两边同时乘上
求解,
(2)先化简,再根据等式的性质,在方程两边同时乘上5求解,
(3)先化简,再根据等式的性质,在方程两边同时乘上
求解,
| 3 |
| 4 |
(2)先化简,再根据等式的性质,在方程两边同时乘上5求解,
(3)先化简,再根据等式的性质,在方程两边同时乘上
| 6 |
| 35 |
解答:解:(1)x+
x=24,
x=24,
x×
=24×
,
x=18;
(2)
x=0.7÷
,
x=
,
x×5=
×5,
x=7;
(3)x÷
=
÷
,
x÷
=
,
x÷
×
=
×
,
x=
.
| 1 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 3 |
| 4 |
| 3 |
| 4 |
x=18;
(2)
| 1 |
| 5 |
| 1 |
| 2 |
| 1 |
| 5 |
| 7 |
| 5 |
| 1 |
| 5 |
| 7 |
| 5 |
x=7;
(3)x÷
| 6 |
| 35 |
| 26 |
| 45 |
| 13 |
| 25 |
x÷
| 6 |
| 35 |
| 10 |
| 9 |
x÷
| 6 |
| 35 |
| 6 |
| 35 |
| 10 |
| 9 |
| 6 |
| 35 |
x=
| 4 |
| 21 |
点评:本题考查了学生根据等式的性质解方程的能力,注意等号对齐.
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