题目内容
|
|
10×
|
分析:(1)(2)按照从左到右的顺序计算;
(3)运用乘法结合律简算.
(3)运用乘法结合律简算.
解答:解:(1)
×
×
,
=
×
,
=
;
(2)
×22×
,
=
×
,
=
;
(3)10×
×
,
=10×(
×
),
=10×
,
=
.
| 3 |
| 7 |
| 1 |
| 13 |
| 91 |
| 9 |
=
| 3 |
| 91 |
| 91 |
| 9 |
=
| 1 |
| 3 |
(2)
| 1 |
| 33 |
| 3 |
| 4 |
=
| 2 |
| 3 |
| 3 |
| 4 |
=
| 1 |
| 2 |
(3)10×
| 7 |
| 15 |
| 9 |
| 28 |
=10×(
| 7 |
| 15 |
| 9 |
| 28 |
=10×
| 3 |
| 20 |
=
| 3 |
| 2 |
点评:本题考查了分数的连乘,计算时要细心,运用合适的简便方法计算.
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