问题
解答题
计算 (1)-40-19+24; (2)-7+13-6+20 (3)1+(-2)+|-2-3|-5 (4)
|
答案
(1)原式=-59+24
=-35;
(2)原式=-13+33
=20;
(3)原式=1-2+5-5
=-1;
(4)原式=[
+(-1 2
)]+[(-1 2
)-(+2 3
)]-(-1 3
)4 5
=-1+4 5
=-
.1 5
计算 (1)-40-19+24; (2)-7+13-6+20 (3)1+(-2)+|-2-3|-5 (4)
|
(1)原式=-59+24
=-35;
(2)原式=-13+33
=20;
(3)原式=1-2+5-5
=-1;
(4)原式=[
+(-1 2
)]+[(-1 2
)-(+2 3
)]-(-1 3
)4 5
=-1+4 5
=-
.1 5