(1)(214)2×42(2)[(12)2]3×(23)3(3)(-0.125)12×(-123)7×(-8)13×(-35)9(4)-82003×(0.125...

2023-06-14 07:43发布

这道初中数学的题目是:
(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
1条回答
月夜星辉
2023-06-14 07:55
这道初中数学题的正确答案为:
(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;
解题思路 14

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