题目内容
能简算要简算
5÷
|
(
|
33
|
|
分析:(1)先算除法,再算减法;
(2)先算小括号里面的加法和减法,再按照从左向右的顺序进行计算;
(3)把带分数化成假分数,然后再计算;
(4)根据乘法分配律进行计算.
(2)先算小括号里面的加法和减法,再按照从左向右的顺序进行计算;
(3)把带分数化成假分数,然后再计算;
(4)根据乘法分配律进行计算.
解答:解:
(1)5÷
-
÷5,
=9-
,
=8
;
(2)(
+
)÷(
-
)×
,
=
÷
×
,
=
×
,
=
;
(3)33
×
,
=
×
,
=
;
(4)
×
+
,
=
×(
+1),
=
×
,
=
.
(1)5÷
| 5 |
| 9 |
| 5 |
| 9 |
=9-
| 1 |
| 9 |
=8
| 8 |
| 9 |
(2)(
| 2 |
| 5 |
| 2 |
| 3 |
| 5 |
| 6 |
| 3 |
| 4 |
| 1 |
| 2 |
=
| 16 |
| 15 |
| 1 |
| 12 |
| 1 |
| 2 |
=
| 64 |
| 5 |
| 1 |
| 2 |
=
| 32 |
| 5 |
(3)33
| 7 |
| 9 |
| 1 |
| 16 |
=
| 304 |
| 9 |
| 1 |
| 16 |
=
| 19 |
| 9 |
(4)
| 3 |
| 7 |
| 1 |
| 6 |
| 3 |
| 7 |
=
| 3 |
| 7 |
| 1 |
| 6 |
=
| 3 |
| 7 |
| 7 |
| 6 |
=
| 1 |
| 2 |
点评:此题主要考查分数的四则混合运算的运算顺序和应用运算定律进行简便计算.
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