问题
解答题
计算: (1)-22×
(2)-12-|0.5-
|
答案
(1)原式=-4×
+9×1 4
=-1+1=0;1 9
(2)原式=-1-
×3×(-2-9)=-1-1 6
×3×(-11)=-1+1 6
=11 2
(或49 2
).1 2
计算: (1)-22×
(2)-12-|0.5-
|
(1)原式=-4×
+9×1 4
=-1+1=0;1 9
(2)原式=-1-
×3×(-2-9)=-1-1 6
×3×(-11)=-1+1 6
=11 2
(或49 2
).1 2