题目内容

怎样简便怎样计算
6
13
÷
5
11
×
5
6
   
7
15
-
2
15
÷0.3  
③﹙
11
15
-
4
5
7
20
﹚÷
1
60
 
④37×
35
36
⑤﹙4-
5
12
÷
1
6
﹚÷0.1 
⑥0.75×46+
3
4
×55-3÷4.
分析:(1)(2)(5)依据四则运算顺序计算方法解答,
(3)(4)(6)依据乘法分配律解答.
解答:解;(1)
6
13
÷
5
11
×
5
6

=
66
65
×
5
6

=
11
13


(2)
7
15
-
2
15
÷0.3,
=
7
15
-
4
9

=
1
45

 
(3)﹙
11
15
-
4
5
7
20
﹚÷
1
60

=
11
15
×
60-
4
5
×60+
7
20
×60,
=44-48+21,
=65-48,
=17;

(4)37×
35
36

=(36+1)×
35
36

=36×
35
36
+1×
35
36

=35+
35
36

=35
35
36


(5)﹙4-
5
12
÷
1
6
﹚÷0.1,
=(4-2.5)÷0.1,
=1.5÷0.1,
=15;

(6)0.75×46+
3
4
×55-3÷4,
=
3
4
×(46+55-1),
=
3
4
×100,
=75.
点评:本题主要考查学生对于分数四则运算计算方法,以及乘法分配律知识的掌握,还要注意在计算中能约分的要约分.
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