问题
解答题
计算 (1)(+7)+(-4)-(-3)-14 (2)-33-|-1|-(-1)2009+
(3)24
(4)(-
|
答案
(1)原式=7-4+3-14=-8;
(2)原式=-9-1+1+
=-81 2
;1 2
(3)原式=(25-
)×(-4)=-100+1 16
=-991 4
;3 4
(4)原式=(-
)÷1 30
=-15-10+2 30
×1 30
=-30 7
.1 7