题目内容
用简便方法计算下面各题.
(
|
6×4
|
|
(1)(
+
)×12,
=
×12+
×12,
=8+9,
=17:
(2)6×4
,
=6×4+6×
,
=24+
,
=25
;
(3)
×17+
×13,
=
×(17+13),
=
×30,
=21.
| 2 |
| 3 |
| 3 |
| 4 |
=
| 2 |
| 3 |
| 3 |
| 4 |
=8+9,
=17:
(2)6×4
| 11 |
| 36 |
=6×4+6×
| 11 |
| 36 |
=24+
| 11 |
| 6 |
=25
| 5 |
| 6 |
(3)
| 7 |
| 10 |
| 7 |
| 10 |
=
| 7 |
| 10 |
=
| 7 |
| 10 |
=21.
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