问题
解答题
计算: (1)-
(2)8×(-
(3)-14-2×(-3)2÷6 (4)5+18÷(
(5)-9÷3+(
(6)-42×[(1-7)÷6]3+[(-5)3-3]÷(-2)2. |
答案
(1)-
+2 3
-(-4 5
)-1 5 1 3
=[(-
)+(-2 3
)]+[1 3
-(-4 5
)]1 5
=(-1)+1
=0;
(2)8×(-
)×(-4)-23 4
=8×
×4-23 4
=24-2
=22;
(3)-14-2×(-3)2÷6
=-1-2×9÷6
=-1-18÷6
=-1-3
=-4;
(4)5+18÷(
)2×(-3 2
)-|-2|4 3
=5+18÷
×(-9 4
)-24 3
=5+18×
×(-4 9
)-24 3
=5+(-
)+(-2)32 3
=5+(-
)38 3
=-7
;2 3
(5)-9÷3+(
-1 2
)×12+(-3)22 3
=-3+
×12-1 2
×12+92 3
=-3+6-8+9
=(-3)+(-8)+(6+9)
=-11+15
=4;
(6)-42×[(1-7)÷6]3+[(-5)3-3]÷(-2)2
=-16×[-6÷6]3+(-125-3)÷4
=-16×(-1)+(-128)÷4
=16+(-32)
=-(32-16)
=-16.