问题
解答题
计算: (1)
(2)-5-[(-2)3+(1-0.8×
(3)-0.52+
|
答案
(1)
÷(-22 5
)-2 5
×(-18 21
)-0.5÷2×3 4 1 2
=
×(-2 5
)+5 12
×8 21
-7 4
×1 2
×1 2 1 2
=-
+1 6
-2 3 1 8
=
;3 8
(2)-5-[(-2)3+(1-0.8×
)÷(-2)]3 4
=-5-[-8+(1-0.6)÷(-2)]
=-5-[-8+0.4÷(-2)]
=-5-[-8-0.2)]
=-5+8.2
=3.2;
(3)-0.52+
-|-22-4|-(-11 4
)3×1 2 16 27
=-
+1 4
-|-4-4|+1 4
×27 8 16 27
=-8+2
=-6.