题目内容
直接写出得数. += | += | -= | += |
+= | -= | -= | -= |
++= | 1--= | ++= | -+= |
解:=,
=1,
==,
==,
=1,
==,
=,
=,
=,
1--==,
=,
=.
故答案由此为:,1,,,1,,,,,,,.
分析:(1)同分母的分数相加减,分母不变,分子相加减;
(2)异分母的分数相加减,先通分,化成同分母的分数,再相加减.
点评:此题主要考查了分数加、减法的计算方法.
=1,
==,
==,
=1,
==,
=,
=,
=,
1--==,
=,
=.
故答案由此为:,1,,,1,,,,,,,.
分析:(1)同分母的分数相加减,分母不变,分子相加减;
(2)异分母的分数相加减,先通分,化成同分母的分数,再相加减.
点评:此题主要考查了分数加、减法的计算方法.
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