问题
解答题
|
答案
(1)原式=-32+17-23
=-55+17
=-38;
(2)原式=-20+2=-18;
(3)原式=9+8-12=5;
(4)原式=-1-
×3 2
×1 3 1 4
=-1+1 8
=-
.7 8
|
(1)原式=-32+17-23
=-55+17
=-38;
(2)原式=-20+2=-18;
(3)原式=9+8-12=5;
(4)原式=-1-
×3 2
×1 3 1 4
=-1+1 8
=-
.7 8