题目内容
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分析:(1)、(3)根据分数四则混合运算的运算顺序进行计算即可得到答案;
(2)把原式改写为
×17+
×1,然后再按照乘法分配律进行计算即可得到答案.
(2)把原式改写为
| 5 |
| 9 |
| 5 |
| 9 |
解答:解:(1)
×9÷
×9
=21÷
×9,
=9×9,
=81;
(2)
×17+
=
×17+
×1,
=
×(17+1),
=
×18,
=10;
(3)
÷[
×﹙1-
﹚]
=
÷[
×
],
=
÷
,
=5
.
| 7 |
| 3 |
| 7 |
| 3 |
=21÷
| 7 |
| 3 |
=9×9,
=81;
(2)
| 5 |
| 9 |
| 5 |
| 9 |
=
| 5 |
| 9 |
| 5 |
| 9 |
=
| 5 |
| 9 |
=
| 5 |
| 9 |
=10;
(3)
| 8 |
| 9 |
| 2 |
| 3 |
| 3 |
| 4 |
=
| 8 |
| 9 |
| 2 |
| 3 |
| 1 |
| 4 |
=
| 8 |
| 9 |
| 1 |
| 6 |
=5
| 1 |
| 3 |
点评:此题主要考查的是分数四则混合运算的运算顺序和简便运算的灵活应用.
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