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