0.2+0.8-0.2+0.8=0
×
×
.(判斷對錯)
分析:按照運(yùn)算順序,直接算出結(jié)果比較即可.
解答:解:0.2+0.8-0.2+0.8
=1-0.2+0.8
=0.8+0.8
=1.6;
1.6≠0;
所以原題計算錯誤.
故答案為:×.
點評:小數(shù)混合運(yùn)算的關(guān)鍵是搞清運(yùn)算順序,正確按運(yùn)算順序計算即可.
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