题目内容
计算,能简便计算的要简算:
|
|
| ||||||||||||||||||||
| (
|
|
考点:分数的四则混合运算,分数的简便计算
专题:运算顺序及法则
分析:(1)、(2)、(3)、(4)、按照从左向右的顺序进行计算;
(5)先算加法,再算乘法;
(6)根据乘法分配律进行简算.
(5)先算加法,再算乘法;
(6)根据乘法分配律进行简算.
解答:
解:(1)
×
×
=
×
=
;
(2)
÷
÷
=
÷
=
;
(3)
×
×
=
×
=
;
(4)
×
÷
=
÷
=
;
(5)(
+
)×
=
×
=
;
(6)
×
+
×
=
×(
+
)
=
×1
=
.
| 5 |
| 12 |
| 7 |
| 25 |
| 3 |
| 14 |
=
| 7 |
| 60 |
| 3 |
| 14 |
=
| 1 |
| 40 |
(2)
| 7 |
| 9 |
| 1 |
| 2 |
| 35 |
| 36 |
=
| 14 |
| 9 |
| 35 |
| 36 |
=
| 8 |
| 5 |
(3)
| 3 |
| 5 |
| 8 |
| 9 |
| 5 |
| 8 |
=
| 8 |
| 15 |
| 5 |
| 8 |
=
| 1 |
| 3 |
(4)
| 17 |
| 12 |
| 3 |
| 34 |
| 2 |
| 19 |
=
| 1 |
| 8 |
| 2 |
| 19 |
=
| 19 |
| 16 |
(5)(
| 7 |
| 8 |
| 13 |
| 34 |
| 1 |
| 14 |
=
| 171 |
| 136 |
| 1 |
| 14 |
=
| 171 |
| 1904 |
(6)
| 5 |
| 6 |
| 1 |
| 4 |
| 3 |
| 4 |
| 5 |
| 6 |
=
| 5 |
| 6 |
| 1 |
| 4 |
| 3 |
| 4 |
=
| 5 |
| 6 |
=
| 5 |
| 6 |
点评:考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算定律简便计算.
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