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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