问题
解答题
计算: (1)(-38)+52+118+(-62); (2)(-3
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答案
(1)(-38)+52+118+(-62)
=(-38-62)+(52+118)
=-100+170
=70;
(2)(-3
)-(-22 3
)-(-13 4
)-(+1.75)2 3
=-3
+22 3
+13 4
-1.752 3
=(-3
+12 3
)+(22 3
-13 4
)3 4
=-2+1
=-1.