题目内容
| 3 |
| 5 |
| 2 |
| 5 |
| 3 |
| 4 |
| 4 |
| 9 |
| 1 |
| 3 |
| 4 |
| 5 |
| 7 |
| 15 |
| 4 |
| 7 |
| 3 |
| 8 |
| 4 |
| 5 |
| 7 |
| 30 |
| 3 |
| 4 |
| 2 |
| 5 |
| 5 |
| 12 |
| 5 |
| 6 |
| 5 |
| 8 |
分析:(1)(2)(3)按照先算第二级运算,再算第一级运算的顺序解答,
(4)按照先算括号里面的,再算括号外面的顺序解答,
(5)运用乘法分配律解答.
(4)按照先算括号里面的,再算括号外面的顺序解答,
(5)运用乘法分配律解答.
解答:解:(1)
-
×
=
-
=
;
(2)36×
+
=16+
=16
;
(3)
+
×
=
+
=1
;
(4)(
+
)×
=
×
=
;
(5)24×(
-
)
=24×
-24×
=20-15
=5.
| 3 |
| 5 |
| 2 |
| 5 |
| 3 |
| 4 |
=
| 3 |
| 5 |
| 3 |
| 10 |
=
| 3 |
| 10 |
(2)36×
| 4 |
| 9 |
| 1 |
| 3 |
=16+
| 1 |
| 3 |
=16
| 1 |
| 3 |
(3)
| 4 |
| 5 |
| 7 |
| 15 |
| 4 |
| 7 |
=
| 4 |
| 5 |
| 4 |
| 15 |
=1
| 1 |
| 15 |
(4)(
| 3 |
| 4 |
| 2 |
| 5 |
| 5 |
| 12 |
=
| 23 |
| 20 |
| 5 |
| 12 |
=
| 23 |
| 48 |
(5)24×(
| 5 |
| 6 |
| 5 |
| 8 |
=24×
| 5 |
| 6 |
| 5 |
| 8 |
=20-15
=5.
点评:本题考查知识点:(1)依据四则运算计算方法正确进行计算,(2)运用简便方法解决问题.
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