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40÷5=(40÷5)÷(5÷5)=(40×7)÷(5×7)
正确
分析:根据商不变性质:被除数和除数同时扩大或缩小相同的倍数(0除外),商不变;据此解答.
解答:40÷5=(40÷5)÷(5÷5)=(40×7)÷(5×7);
故答案为:正确.
点评:此题考查了商不变性质的应用.
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