(0.35+0.65)÷0.2+0.8=1÷0.2+0.8=5.7.
錯誤.
錯誤.
分析:要想知道此題結(jié)果是否正確,應(yīng)通過計算加以判斷.先算括號內(nèi)的,再算括號外的除法,最后算括號外的加法.此題運算順序正確,結(jié)果錯誤.
解答:解:(0.35+0.65)÷0.2+0.8,
=1÷0.2+0.8,
=5+0.8,
=5.8;
故答案為:錯誤.
點評:解答四則混合運算的題目,關(guān)鍵掌握運算順序.還要注意細(xì)心,不要出現(xiàn)“筆下誤”等毛。
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