题目内容
用简便方法计算.
(1)24×(
| (2)
|
(1)24×(
+
-
)
=24×
+24×
-24×
,
=6+4-8,
=2;
(2)
+
+8.875+
=
+
+8
+
,
=(
+8
)+(
+
),
=9+1,
=10.
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 3 |
=24×
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 3 |
=6+4-8,
=2;
(2)
| 1 |
| 8 |
| 5 |
| 7 |
| 2 |
| 7 |
=
| 1 |
| 8 |
| 5 |
| 7 |
| 7 |
| 8 |
| 2 |
| 7 |
=(
| 1 |
| 8 |
| 7 |
| 8 |
| 5 |
| 7 |
| 2 |
| 7 |
=9+1,
=10.
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