问题 解答题
计算,能简便算就简便算.
3
14
÷
15
28
×10
9
5
×
2
3
÷
18
35

2014×
2012
2013

1
21
×
1
17
×(2014×42×85)
19
17
×
13
15
-
2
17
÷15×13.
答案

(1)

3
14
÷
15
28
×10

=

2
5
×10

=4;

(2)

9
5
×
2
3
÷
18
35

=

6
5
×
35
18

=

7
3

(3)2014×

2012
2013

=(2013+1)×

2012
2013

=2013×

2012
2013
+1×
2012
2013

=2012+

2012
2013

=2012

2012
2013

(4)

1
21
×
1
17
×(2014×42×85)

=(

1
21
×42)×(
1
17
×85)×2014

=2×5×2014

=10×2014

=20140;

(5)

19
17
×
13
15
-
2
17
÷15×13

=

19
17
×
13
15
-
2
17
×(
1
15
×13)

=

19
17
×
13
15
-
2
17
×
13
15

=(

19
17
-
2
17
)×
13
15

=1×

13
15

=

13
15

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