问题 解答题
(1)(2
1
4
2×42
(2)[(
1
2
2]3×(233
(3)(-0.125)12×(-1
2
3
7×(-8)13×(-
3
5
9
(4)-82003×(0.125)2002+(0.25)17×417
答案

(1)(2

1
4
2×42

=(

9
4
2×42

=81;

(2)[(

1
2
2]3×(233

=(

1
2
6×29

=(

1
2
×2)6×23

=23

=8;

(3)(-0.125)12×(-1

2
3
7×(-8)13×(-
3
5
9

=(-

1
8
12×(-
5
3
7×(-8)13×(-
3
5
9

=-(

1
8
12×813×(
5
3
7×(
3
5
9

=-(

1
8
×8)12×8×(
5
3
×
3
5
7×(
3
5
2

=-8×

9
25

=-

72
25

(4)-82003×(0.125)2002+(0.25)17×417

=-8×82002×(

1
8
2002+(
1
4
17×417

=-(8×

1
8
2002×8+(
1
4
×4)17

=-8+1,

=-7;

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