题目内容
计算下面各题.
|
|
(
|
|
分析:(1)按照先算乘法,再算加法顺序解答,
(2)先按照从左到右顺序计算括号里面的,再算括号外面的除法顺序即可解答,
(3)运用乘法分配律解答,
(4)按照从左到右顺序解答.
(2)先按照从左到右顺序计算括号里面的,再算括号外面的除法顺序即可解答,
(3)运用乘法分配律解答,
(4)按照从左到右顺序解答.
解答:解:(1)
+
×
=
+
=1
;
(2)
÷(1-
-
)
=
÷(
-
)
=
÷
=6;
(3)(
-
)÷
=
×
-
×
=2-
=
;
(4)
×
÷
=
÷
=
.
| 4 |
| 5 |
| 2 |
| 3 |
| 6 |
| 7 |
=
| 4 |
| 5 |
| 4 |
| 7 |
=1
| 13 |
| 35 |
(2)
| 3 |
| 4 |
| 1 |
| 2 |
| 3 |
| 8 |
=
| 3 |
| 4 |
| 1 |
| 2 |
| 3 |
| 8 |
=
| 3 |
| 4 |
| 1 |
| 8 |
=6;
(3)(
| 5 |
| 6 |
| 3 |
| 4 |
| 5 |
| 12 |
=
| 5 |
| 6 |
| 12 |
| 5 |
| 3 |
| 4 |
| 12 |
| 5 |
=2-
| 9 |
| 5 |
=
| 1 |
| 5 |
(4)
| 7 |
| 10 |
| 5 |
| 16 |
| 21 |
| 32 |
=
| 7 |
| 32 |
| 21 |
| 32 |
=
| 1 |
| 3 |
点评:(1)依据四则运算计算方法正确进行计算,(2)正确运用乘法分配律解决问题,是本题考查知识点.
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