题目内容

计算,能简便的简便运算.
17×
9
16
4
25
+
8
75
)×150
5
8
×
9
10
+
5
8
×
3
10
5
4
×
1
8
×64
3
10
+
2
9
×
3
10
44-72×
5
12
分析:(1)(2)(3)(4)(5)利用乘法分配律解答;
(6)先算乘法再算减法;
据此解答即可.
解答:解:
17×
9
16
=(16+1)×
9
16

=16×
9
16
+
9
16

=9
9
16


4
25
+
8
75
)×150
=
4
25
×150+
8
75
×150
=24+16,
=40;

5
8
×
9
10
+
5
8
×
3
10

=
5
8
×(
9
10
+
3
10
),
=
5
8
×
6
5

=
3
4


5
4
×
1
8
×64,
=
5
4
×(
1
8
×64),
=
5
4
×8,
=10;

3
10
+
2
9
×
3
10

=
3
10
×(1+
2
9
),
=
3
10
×
11
9

=
11
30


44-72×
5
12

=44-30,
=14.
点评:此题考查了分数的加减乘除运算,根据规律,能简算的要简算.
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