题目内容
脱式计算:
|
|
|
(
|
分析:(1)按照先算除法,再算减法顺序解答,
(2)按照从左到右顺序解答,
(3)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.
(2)按照从左到右顺序解答,
(3)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.
解答:解:(1)
-
÷3
=
-
=
;
(2)
÷
÷
=
÷
=1
;
(3)
×
+
×
=(
+
)×
=1×
=
;
(4)(
×
)×36
=
×36
=3.
| 3 |
| 4 |
| 3 |
| 4 |
=
| 3 |
| 4 |
| 1 |
| 4 |
=
| 1 |
| 2 |
(2)
| 8 |
| 7 |
| 4 |
| 5 |
| 7 |
| 8 |
=
| 10 |
| 7 |
| 7 |
| 8 |
=1
| 31 |
| 49 |
(3)
| 1 |
| 2 |
| 3 |
| 5 |
| 2 |
| 5 |
| 1 |
| 2 |
=(
| 3 |
| 5 |
| 2 |
| 5 |
| 1 |
| 2 |
=1×
| 1 |
| 2 |
=
| 1 |
| 2 |
(4)(
| 1 |
| 3 |
| 1 |
| 4 |
=
| 1 |
| 12 |
=3.
点评:(1)依据四则运算计算方法正确进行计算,(2)正确运用简便方法解决问题,是本题考查知识点.
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