问题
解答题
(1)(-2)-(-5)+(-9)-(-7) (2)18-6÷(-2)×(-
(3)(-
(4)-11-2×(-33)+(-22) |
答案
(1)原式=-2+5-9+7
=-11+12
=1;
(2)原式=18-6×(-
)×(-1 2
)1 3
=18-1
=17;
(3)原式=-
×(-8)-3 4
×3 4
-2 3
×(-3 4
)1 3
=6-
+1 2
=6-1 4 1 4
=5
;3 4
(4)原式=-11+66-22
=66-33
=33.