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7.8 9.9+0.78的简便运算

7.89.9+0.78得简便方法是什么?运用乘法分配律使计算简便: 7.8x9.9+0.78 =7.8x9.9+7.8x0.1 =7.8x(9.9+0.1) =7.8x10 =78 乘法

【7.8*9.9+0.78的简便计算该怎么算?是简便计算,不是递=7.8*(10-0.1)+0.78=78-0.78+0.78=78

请问7.8x9.9+0.78怎么简算谢谢!回答:算式7.8×(9.9+0.1)=78。

7.8*9.9+0.78的简便计算回答:7.8*9.9+7.8*0.1 =7.8*(9.9+0.1) =7.8*10 =78

9.9×7.8+0.78怎样简便计算9.9×7.8+0.78=9.9X7.8+0.1X7.8=(9.9+0.1)X7.8=7.8X10=78

7.8×9.9+0.78=?(简算)回答:=7.8X9.9+7.8X0.1 =7.8X(9.9+0.1) =7.8X10 =78

7.8*9.9+0.78的简便计算该怎么算? 是简便计算,不是递等式计回答:=7.8*(10-0.1)+0.78 =78-0.78+0.78 =78

0.78加7.8乘以9.9用简便方法怎么做0.78+7.8*9.9 =0.78+0.78*99 =0.78*(1+99)=0.78*100 =78 其中*代表乘法

7.8*9.9+0.78的简便计算7.8*9.9+7.8*0.1=7.8*(9.9+0.1)=7.8*10=78

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