题目内容
用简便方法计算下面各题
+
+
+
44×(
-
)
| 5 |
| 7 |
| 9 |
| 10 |
| 11 |
| 10 |
| 2 |
| 7 |
44×(
| 5 |
| 11 |
| 1 |
| 4 |
分析:(1)运用加法交换律与结合律简算;
(2)运用乘法分配律简算.
(2)运用乘法分配律简算.
解答:解:(1)
+
+
+
,
=(
+
)+(
+
),
=1+2,
=3;
(2)44×(
-
),
=44×
+44×
,
=20-11,
=9.
| 5 |
| 7 |
| 9 |
| 10 |
| 11 |
| 10 |
| 2 |
| 7 |
=(
| 5 |
| 7 |
| 2 |
| 7 |
| 9 |
| 10 |
| 11 |
| 10 |
=1+2,
=3;
(2)44×(
| 5 |
| 11 |
| 1 |
| 4 |
=44×
| 5 |
| 11 |
| 1 |
| 4 |
=20-11,
=9.
点评:完成本题,要注意分析式中数据,运用合适的简便方法计算.
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