问题
解答题
计算 (1)(-
(2)(
(3)-24+5×(-3)-6÷(-
(4)(1-
(5)-16-[-2-(-3)3]-|
(6)0.7×1
|
答案
(1)原式=-1+
=-3 7
;4 7
(2)原式=-18-30+21=-27;
(3)原式=-16-15+36=5;
(4)原式=
×(-6)+4×(-3)=-2-12=-14;1 3
(5)原式=-1-(-2+27)-|
-1 8
|=-1-25-1 4
=-261 8
;1 8
(6)原式=0.7×(1
+4 9
)+(25 9
+3 4
)×(-15)=0.7×2+3×(-15)=1.4-45=-43.6.1 4