题目内容
用你喜欢的方法计算
|
24×(
|
15×13×(
|
考点:分数的四则混合运算
专题:运算顺序及法则
分析:(1)按照从左到右顺序计算即可解答,
(2)(3)运用乘法分配律解答.
(2)(3)运用乘法分配律解答.
解答:
解:(1)
×
÷
=
÷
=
;
(2)24×(
-
-
)
=24×
-24×
-24×
=9-2-4
=3;
(3)15×13×(
-
)
=15×13×
-15×13×
=30-13
=17.
| 5 |
| 9 |
| 2 |
| 5 |
| 4 |
| 9 |
=
| 2 |
| 9 |
| 4 |
| 9 |
=
| 1 |
| 2 |
(2)24×(
| 3 |
| 8 |
| 1 |
| 12 |
| 1 |
| 6 |
=24×
| 3 |
| 8 |
| 1 |
| 12 |
| 1 |
| 6 |
=9-2-4
=3;
(3)15×13×(
| 2 |
| 13 |
| 1 |
| 15 |
=15×13×
| 2 |
| 13 |
| 1 |
| 15 |
=30-13
=17.
点评:(1)依据四则运算计算方法正确进行计算,(2)运用乘法分配律解决问题,是本题考查知识点.
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