數(shù)學公式=1-1=0.
錯誤
分析:按照從左到右的順序計算,得出結(jié)果與0比較即可求解.
解答:,
=1-+,
=+,
=;
≠0;
故答案為:×.
點評:本題要注意運算的順序,不要錯用運算定律.
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