题目内容
计算
|
|
| ||||||||||||||||
|
| 21×
|
考点:分数的四则混合运算
专题:运算顺序及法则
分析:依据分数乘法计算方法,按照从左到右顺序计算即可解答.
解答:
解:
×
×
=
×
=
;
×
×
=
×
=
;
×12×
=9×
=2;
×
×
=
×
=
;
×
×6
=
×6
=
;
21×
×
=
×
=
.
| 3 |
| 4 |
| 8 |
| 15 |
| 5 |
| 12 |
=
| 2 |
| 5 |
| 5 |
| 12 |
=
| 1 |
| 6 |
| 4 |
| 3 |
| 4 |
| 15 |
| 9 |
| 16 |
=
| 16 |
| 45 |
| 9 |
| 16 |
=
| 1 |
| 5 |
| 3 |
| 4 |
| 2 |
| 9 |
=9×
| 2 |
| 9 |
=2;
| 7 |
| 4 |
| 10 |
| 21 |
| 3 |
| 5 |
=
| 5 |
| 6 |
| 3 |
| 5 |
=
| 1 |
| 2 |
| 11 |
| 36 |
| 9 |
| 22 |
=
| 1 |
| 8 |
=
| 3 |
| 4 |
21×
| 3 |
| 35 |
| 5 |
| 12 |
=
| 9 |
| 5 |
| 5 |
| 12 |
=
| 3 |
| 4 |
点评:本题主要考查学生运用分数乘法计算方法解决问题的能力.
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