题目内容
神机妙算.
27×
÷72
×
÷
(
-0.5)÷
.
27×
| 4 |
| 5 |
| 3 |
| 4 |
| 1 |
| 5 |
| 9 |
| 10 |
(
| 5 |
| 6 |
| 1 |
| 2 |
分析:(1)按照从左向右的顺序进行计算;
(2)按照从左向右的顺序进行计算
(3)先算减法,再算除法.
(2)按照从左向右的顺序进行计算
(3)先算减法,再算除法.
解答:解:(1)27×
÷72
=
÷72
=
;
(2)
×
÷
=
÷
=
;
(3)(
-0.5)÷
=
÷
=
.
| 4 |
| 5 |
=
| 108 |
| 5 |
=
| 3 |
| 10 |
(2)
| 3 |
| 4 |
| 1 |
| 5 |
| 9 |
| 10 |
=
| 3 |
| 20 |
| 9 |
| 10 |
=
| 1 |
| 6 |
(3)(
| 5 |
| 6 |
| 1 |
| 2 |
=
| 1 |
| 3 |
| 1 |
| 2 |
=
| 2 |
| 3 |
点评:考查了分数四则混合运算.注意运算顺序和运算法则,然后再进一步计算.
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