问题
解答题
计算下列各题: (1)(+10
(2)(-81)÷
(3)-32-[-5-0.2÷
(4)24×(
|
答案
(1)(+10
)+(-11.5)+(-101 3
)-(+4.5)1 3
=10
-11.5-101 3
-4.51 3
=10
-101 3
-11.5-4.51 3
=-16;
(2)(-81)÷
×9 4
÷(-16)4 9
=(-81)×
×4 9
÷(-16)4 9
=-16÷(-16)
=1;
(3)-32-[-5-0.2÷
×(-2)2]4 5
=-9-[-5-
×1 5
×4]5 4
=-9-[-5-1]
=-9+6
=-3;
(4)24×(
-1 6
-3 4
)+(-5 8
)2÷(-1 3
)1 72
=24×
-24×1 6
-24×3 4
+5 8
×(-72)1 9
=4-18-15-8
=4-41
=-37.