问题
解答题
计算: (1)0-(+8)+(-2.7)-(+5); (2)-3.92+6.24-8.56+4.28; (3)0.25+
(4)-
|
答案
(1)原式=0-8-2.7-5,
=-15.7;
(2)原式=(6.24+4.28)-(3.92+8.56),
=10.52-12.48,
=-1.96;
(3)原式=(
-1 4
)+(1 4
-1 12
-5 12
),2 3
=-1;
(4)原式=(-
+5 6
)+(-3.74+3.74)+17.8,5 6
=17.8.