题目内容
计算:
×27+
×41;
×
-
×
.
| 1 |
| 5 |
| 3 |
| 5 |
| 6 |
| 11 |
| 22 |
| 5 |
| 5 |
| 12 |
| 3 |
| 10 |
考点:整数、分数、小数、百分数四则混合运算
专题:运算顺序及法则
分析:(1)先算乘法,再算加法.
(2)先算乘法,再算减法.
(2)先算乘法,再算减法.
解答:
解:(1)
×27+
×41
=
+
=30
(2)
×
-
×
=
-
=
| 1 |
| 5 |
| 3 |
| 5 |
=
| 27 |
| 5 |
| 123 |
| 5 |
=30
(2)
| 6 |
| 11 |
| 22 |
| 5 |
| 5 |
| 12 |
| 3 |
| 10 |
=
| 12 |
| 5 |
| 1 |
| 8 |
=
| 91 |
| 40 |
点评:考查了分数的四则混合运算,注意运算顺序和运算法则.
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