问题
解答题
计算: (1)(-4
(2)-14-(1-0.5)×
|
答案
(1)(-4
)-(-57 8
)+(-41 2
)-(+31 4
)=-41 8
+57 8
-41 2
-31 4
=-41 8
-37 8
+51 8
-41 2
=-8+51 4
-41 2
=-61 4
;3 4
(2)-14-(1-0.5)×
×[2-(-3)2]=-1-1 3
×1 2
×[2-9]=-1-1 3
×(-7)=-1+1 6
=7 6
.1 6