问题
解答题
计算. (1)-3+8-7-15 (2)
(3)23-6×(-3)+2×(-4) (4)1÷(
|
答案
(1)原式=-3-7-15+8
=-25+8
=-17;
(2)原式=
-1 2
+1 4 1 6
=
;5 12
(3)原式=23+18-8
=41-8
=33;
(4)原式=1×(-6)×1 6
=-1.
计算. (1)-3+8-7-15 (2)
(3)23-6×(-3)+2×(-4) (4)1÷(
|
(1)原式=-3-7-15+8
=-25+8
=-17;
(2)原式=
-1 2
+1 4 1 6
=
;5 12
(3)原式=23+18-8
=41-8
=33;
(4)原式=1×(-6)×1 6
=-1.