题目内容
(1)(2
)2×42
(2)[(
)2]3×(23)3
(3)(-0.125)12×(-1
)7×(-8)13×(-
)9
(4)-82003×(0.125)2002+(0.25)17×417.
| 1 |
| 4 |
(2)[(
| 1 |
| 2 |
(3)(-0.125)12×(-1
| 2 |
| 3 |
| 3 |
| 5 |
(4)-82003×(0.125)2002+(0.25)17×417.
(1)(2
)2×42,
=(
)2×42,
=81;
(2)[(
)2]3×(23)3,
=(
)6×29,
=(
×2)6×23,
=23,
=8;
(3)(-0.125)12×(-1
)7×(-8)13×(-
)9,
=(-
)12×(-
)7×(-8)13×(-
)9,
=-(
)12×813×(
)7×(
)9,
=-(
×8)12×8×(
×
)7×(
)2,
=-8×
,
=-
;
(4)-82003×(0.125)2002+(0.25)17×417,
=-8×82002×(
)2002+(
)17×417,
=-(8×
)2002×8+(
×4)17,
=-8+1,
=-7;
| 1 |
| 4 |
=(
| 9 |
| 4 |
=81;
(2)[(
| 1 |
| 2 |
=(
| 1 |
| 2 |
=(
| 1 |
| 2 |
=23,
=8;
(3)(-0.125)12×(-1
| 2 |
| 3 |
| 3 |
| 5 |
=(-
| 1 |
| 8 |
| 5 |
| 3 |
| 3 |
| 5 |
=-(
| 1 |
| 8 |
| 5 |
| 3 |
| 3 |
| 5 |
=-(
| 1 |
| 8 |
| 5 |
| 3 |
| 3 |
| 5 |
| 3 |
| 5 |
=-8×
| 9 |
| 25 |
=-
| 72 |
| 25 |
(4)-82003×(0.125)2002+(0.25)17×417,
=-8×82002×(
| 1 |
| 8 |
| 1 |
| 4 |
=-(8×
| 1 |
| 8 |
| 1 |
| 4 |
=-8+1,
=-7;
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