问题
解答题
计算: (1)-
(2)(-125
(3)[1-(1-0.5×
(4)-62-(3-7)2-2×(-1)3-|-2|. |
答案
(1)原式=-
+1 4
+5 6
-2 3 1 2
=-
-1 4
+1 2
+5 6 2 3
=-
+3 4 3 2
=
;3 4
(2)原式=(-125-
)÷(-5)5 7
=125÷5+
÷55 7
=25+1 7
=25
;1 7
(3)原式=[1-(1-
)]×(2-9)1 6
=
×(-7)1 6
=-
;7 6
(4)原式=-36-(-4)2-2×(-1)-2
=-36-16+2-2
=-52.