题目内容
脱式计算
(
+
)÷
×
-
.
(
| 7 |
| 8 |
| 13 |
| 16 |
| 13 |
| 16 |
| 3 |
| 2 |
| 10 |
| 21 |
| 2 |
| 7 |
考点:分数的四则混合运算
专题:运算顺序及法则
分析:(1)运用乘法分配律解答,
(2)按照先算乘法,再算减法顺序计算解答.
(2)按照先算乘法,再算减法顺序计算解答.
解答:
解:(1)(
+
)÷
=
×
+
×
=1
+1
=2
;
(2)
×
-
=
-
=
.
| 7 |
| 8 |
| 13 |
| 16 |
| 13 |
| 16 |
=
| 7 |
| 8 |
| 16 |
| 13 |
| 13 |
| 16 |
| 16 |
| 13 |
=1
| 1 |
| 13 |
=2
| 1 |
| 13 |
(2)
| 3 |
| 2 |
| 10 |
| 21 |
| 2 |
| 7 |
=
| 5 |
| 7 |
| 2 |
| 7 |
=
| 3 |
| 7 |
点评:本题主要考查学生依据四则运算计算方法正确进行计算,以及正确运用简便方法解决问题的能力.
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