题目内容
(2006?长汀县)用简便方法计算(要写出简算过程).
3.64+2.7+4.36 (
+
)×12.
3.64+2.7+4.36 (
1 |
4 |
1 |
6 |
分析:(1)运用加法交换律简算;
(2)运用乘法分配律简算,同时注意约分.
(2)运用乘法分配律简算,同时注意约分.
解答:解:(1)3.64+2.7+4.36,
=3.64+4.36+2.7,
=8+2.7,
=10.7;
(2)(
+
)×12,
=
×12+
×12,
=3+2,
=5.
=3.64+4.36+2.7,
=8+2.7,
=10.7;
(2)(
1 |
4 |
1 |
6 |
=
1 |
4 |
1 |
6 |
=3+2,
=5.
点评:此题重点考查学生对运算定律的运用和掌握情况.
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