问题
解答题
计算下列各题: (1)0-3+(-
(2)10÷[
(3)18+32÷(-2)3-(-4)2×5; (4)-7×(-
|
答案
(1)0-3+(-
)-(-22)-5÷(-4 5
)1 4
=-3-
+4+204 5
=21-4 5
=20
;1 5
(2)10÷[
-(-1+11 2
)]×61 3
=10÷(
-1 2
)×61 3
=10÷
×61 6
=10×6×6
=360;
(3)18+32÷(-2)3-(-4)2×5
=18+32÷(-8)-16×5
=18-4-80
=18-84
=-66;
(4)-7×(-
)+19×(-22 7
)-5×(-22 7
)22 7
=(-7+19-5)×(-
)22 7
=(-12+19)×(-
)22 7
=7×(-
)22 7
=-22.