题目内容
计算:-2
+(-
)+(-3
)+2
+(-1
)+1
= .
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考点:有理数的加法
专题:
分析:根据有理数的加法法则,先把同分母的分数相加,再把所得的结果相加即可.
解答:解:原式=[-2
+(-3
)]+[(-
)+2
]+(-1
)+1
=-5
-2
+(-1
)+1
=-5
-4+1
=-9
+1
=-8
,
故答案为-8
.
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=-5
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=-5
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=-9
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=-8
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故答案为-8
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点评:本题考查了有理数的加法法则,注意先把同分母的分数相加是解此题的关键.
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