问题
解答题
计算下列各题. (1)
(2)(-24)×(
(3)2-6÷(-2)×(-
(4)(-1)2010+(1-0.5)×
|
答案
(1)
-8 15
-5 9 4 9
=
-(8 15
+5 9
)4 9
=
-18 15
=-
;7 15
(2)(-24)×(
-1 8
+1 3
)1 4
=-24×
+24×1 8
-24×1 3 1 4
=-3+8-6
=-1;
(3)2-6÷(-2)×(-
)1 2
=2-3×1 2
=2-1.5
=0.5;
(4)(-1)2010+(1-0.5)×
×[2-(-3)2]1 3
=1+
×1 2
×[2-9]1 3
=1+
×1 2
×[-7]1 3
=1-7 6
=-
.1 6