题目内容
| 736÷16+52 | 220×(0.51-0.31) | 12.5-0.625-
| ||||||||||||||
| 解方程x-
| 解比例21:x=4:
|
解;(1)736÷16+52,
=46+52,
=98;
(2)220×(0.51-0.31),
=220×0.2,
=44;
(3)12.5-0.625-
,
=12.5-(0.625+
),
=12.5-1,
=11.5;
(4)
×[
-(
-
)],
=
×[
-
],
=
×
,
=
;
(5)x-
x=
,
x=
,
x÷
=
÷
,
x=
;
(6)21:x=4:
,
4x=21×
,
4x÷4=7÷4,
x=
.
=46+52,
=98;
(2)220×(0.51-0.31),
=220×0.2,
=44;
(3)12.5-0.625-
| 3 |
| 8 |
=12.5-(0.625+
| 3 |
| 8 |
=12.5-1,
=11.5;
(4)
| 2 |
| 9 |
| 3 |
| 4 |
| 7 |
| 16 |
| 1 |
| 4 |
=
| 2 |
| 9 |
| 3 |
| 4 |
| 3 |
| 16 |
=
| 2 |
| 9 |
| 9 |
| 16 |
=
| 1 |
| 8 |
(5)x-
| 1 |
| 4 |
| 3 |
| 8 |
| 3 |
| 4 |
| 3 |
| 8 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 8 |
| 3 |
| 4 |
x=
| 1 |
| 2 |
(6)21:x=4:
| 1 |
| 3 |
4x=21×
| 1 |
| 3 |
4x÷4=7÷4,
x=
| 7 |
| 4 |
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