问题
解答题
计算: (1)-24-(10-15) (2)(-7)+(+6)-(+9)-(-4) (3)1-(-
(4)(-4
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答案
(1)原式=-24-(-5)
=-24+5
=-19;
(2)原式=-7+6-9+4
=-7-9+6+4
=-16+10
=-6;
(3)原式=1+
-1 2
-1 3 1 6
=
+6 6
-3 6
-2 6 1 6
=1;
(4)原式=-4
+57 8
-41 2
-31 4 1 8
=-4
-37 8
+51 8
-41 2 1 4
=-8+
-22 4 17 4
=-8+1
=-7.