题目内容
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×
×
.分析:根据题意,
-
-
等于
减去
与
的和,这是运用了减法的性质,然后再进一步解答.
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解答:解:
-
-
,
=
-(
+
),(运用了减法的性质)
=
-
,
=
.
故答案为:×.
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=
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=
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=
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故答案为:×.
点评:考查了减法的性质的灵活运用,然后再进一步解答.
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