问题
解答题
计算下列各题: (1)(+10
(2)(-81)÷
(3)-32-[-5-0.2÷
(4)24×(
(5)(-2.5)÷3÷(-
(6)-2•(-
|
答案
(1)原式=(+10
)+(-101 3
)+(-11.5)-(+4.5),1 3
=0+(-16),
=-16;
(2)原式=-16÷(-16),
=1;
(3)原式=-9-[-5-1]
=-9+6
=-3;
(4)原式=24×
-24×1 6
-24×3 4
+5 8
×(-72),1 9
=4-18-15+(-8),
=-37;
(5)-2.5×
×(-6)×(-4),1 3
=20;
(6)原式=-2×
+8+1 4
,1 2
=8.