题目内容
能简算的简算.
2-
÷
27×
(
-
)÷
(
-
)×12.
2-
| 5 |
| 39 |
| 15 |
| 52 |
27×
| 3 |
| 26 |
(
| 14 |
| 15 |
| 7 |
| 8 |
| 7 |
| 8 |
(
| 7 |
| 8 |
| 1 |
| 4 |
考点:整数、分数、小数、百分数四则混合运算,运算定律与简便运算
专题:运算顺序及法则
分析:(1)按照先算除法,再算减法顺序计算解答,
(2)(4)运用乘法分配律解答,
(3)按照先算括号里面的,再算括号外面的顺序计算解答.
(2)(4)运用乘法分配律解答,
(3)按照先算括号里面的,再算括号外面的顺序计算解答.
解答:
解:(1)2-
÷
=2-
=1
;
(2)27×
=26×
+1×
=3+
=3
;
(3)(
-
)÷
=
÷
=
;
(4)(
-
)×12
=
×12-
×12
=10
-3
=7
.
| 5 |
| 39 |
| 15 |
| 52 |
=2-
| 4 |
| 9 |
=1
| 5 |
| 9 |
(2)27×
| 3 |
| 26 |
=26×
| 3 |
| 26 |
| 3 |
| 26 |
=3+
| 3 |
| 26 |
=3
| 3 |
| 26 |
(3)(
| 14 |
| 15 |
| 7 |
| 8 |
| 7 |
| 8 |
=
| 7 |
| 120 |
| 7 |
| 8 |
=
| 1 |
| 15 |
(4)(
| 7 |
| 8 |
| 1 |
| 4 |
=
| 7 |
| 8 |
| 1 |
| 4 |
=10
| 1 |
| 2 |
=7
| 1 |
| 2 |
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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