问题 解答题
计算下面各题,能简算的要简算.
9
14
×14×
2
9
83×
81
82
4
17
×(125×34)
16×(
1
2
-
1
8
2
5
×
2
10
+
9
10
1-
5
14
×
2
9
5
6
×
1
8
×16
16×
5
8
-
5
14
9
10
×20×
4
7
答案

(1)

9
14
×14×
2
9

=9×

2
9

=2;

(2)83×

81
82

=(82+1)×

81
82

=82×

81
82
+1×
81
82

=81+

81
82

=81

81
82

(3)

4
17
×(125×34)

=

4
17
×34×125

=8×125

=1000;

(4)16×(

1
2
-
1
8

=16×

1
2
-16×
1
8

=8-2

=6;

(5)

2
5
×
2
10
+
9
10

=

2
25
+
9
10

=

49
50

(6)1-

5
14
×
2
9

=1-

5
63

=

58
63

(7)

5
6
×
1
8
×16

=

5
6
×(
1
8
×16)

=

5
6
×2

=

5
3

(8)16×

5
8
-
5
14

=10-

5
14

=9

9
14

(9)

9
10
×20×
4
7

=18×

4
7

=

72
7

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