题目内容
计算.
-
÷
÷
×
×
÷
×
×
.
| 5 |
| 9 |
| 4 |
| 15 |
| 3 |
| 5 |
| 2 |
| 3 |
| 15 |
| 28 |
| 15 |
| 21 |
| 7 |
| 10 |
| 5 |
| 16 |
| 21 |
| 32 |
| 8 |
| 9 |
| 1 |
| 4 |
| 3 |
| 8 |
考点:分数的四则混合运算
专题:运算顺序及法则
分析:(1)按照先算除法,再算减法顺序计算解答,
(2)(3)(4)按照从左到右顺序计算解答.
(2)(3)(4)按照从左到右顺序计算解答.
解答:
解:(1)
-
÷
=
-
=
;
(2)
÷
×
=
×
=
;
(3)
×
÷
=
÷
=
;
(4)
×
×
=
×
=
.
| 5 |
| 9 |
| 4 |
| 15 |
| 3 |
| 5 |
=
| 5 |
| 9 |
| 4 |
| 9 |
=
| 1 |
| 9 |
(2)
| 2 |
| 3 |
| 15 |
| 28 |
| 15 |
| 21 |
=
| 56 |
| 45 |
| 15 |
| 21 |
=
| 8 |
| 9 |
(3)
| 7 |
| 10 |
| 5 |
| 16 |
| 21 |
| 32 |
=
| 7 |
| 32 |
| 21 |
| 32 |
=
| 1 |
| 3 |
(4)
| 8 |
| 9 |
| 1 |
| 4 |
| 3 |
| 8 |
=
| 2 |
| 9 |
| 3 |
| 8 |
=
| 1 |
| 12 |
点评:明确运算的顺序并能正确进行计算是此类题目考查知识点.
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