题目内容
| 解方程. (1)x×
| (2)
| ||||||||||
(3)
| (4)x-15%x=37.4. |
(1)x×
=
,
x×
÷
=
÷
,
x=
;
(2)
x-
x=
,
x(
-
)=
,
x=
,
x÷
=
÷
,
x=1;
(3)
x÷2=
,
x÷2×2=
×2,
x=
,
x÷
=
÷
,
x=
;
(4)x-15%x=37.4,
x(1-0.15)=37.4,
0.85x=37.4,
0.85x÷0.85=37.4÷0.85,
x=44.
| 8 |
| 9 |
| 5 |
| 6 |
x×
| 8 |
| 9 |
| 8 |
| 9 |
| 5 |
| 6 |
| 8 |
| 9 |
x=
| 15 |
| 16 |
(2)
| 3 |
| 4 |
| 2 |
| 3 |
| 1 |
| 12 |
x(
| 3 |
| 4 |
| 2 |
| 3 |
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 12 |
x=1;
(3)
| 4 |
| 5 |
| 7 |
| 16 |
| 4 |
| 5 |
| 7 |
| 16 |
| 4 |
| 5 |
| 7 |
| 8 |
| 4 |
| 5 |
| 4 |
| 5 |
| 7 |
| 8 |
| 4 |
| 5 |
x=
| 35 |
| 32 |
(4)x-15%x=37.4,
x(1-0.15)=37.4,
0.85x=37.4,
0.85x÷0.85=37.4÷0.85,
x=44.
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