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7.8乘10.1简便

您好:7.8*10.1=7.8x10+7.8x0.1=78+0.78=78.78 如果本题有什么不明白可以追问,如果满意请点击“采纳为满意回答” 如果有其他问题请采纳本题后另发点击向我求助,答题不易,请谅解,谢谢.祝学习进步!

7.8*10.1=7.8*(10+0.1)=7.8*10+7.8*0.1=78+0.78=78.78

78*10.1=78*(10+0.1)=78*10+78*0.1=780+7.8=787.8

你好!78*(10+0.1) =780 + 7.8 =787.8 仅代表个人观点,不喜勿喷,谢谢.

7*10+7*0.1+0.8*10+0.8*0.1

10乘以78加0.1乘以78

10.1乘以7.8=(10+0.1)*7.8=10*7.8+0.1*7.8=78+0.78=78.78 这就是运用乘法分配率

9.25乘10.1

10.1X7.8=(10+0.1)X(8-0.2)=80+8-2-0.02=85.98

7.9*10.1 =7.9*(10+0.1) =79+0.79 =79.79

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