Question

18*(1/9)²-20*1/9
найдите значение выражения

Answer 1

18*(1/9)²-20*1/9=18*1/81-20/9=2/9-20/9=-18/9=-2

Answer 2

18 х ( 1/9) ^2 - 20 x 1/9 
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1) ( 1/9)^2 = 1/81 
2) 18 x 1/81 = 18/81 
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3) 20 x 1/9 = 20/9 
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4) 18/81 - 20/9 = 18/81 - 180/81 = ( - 162/81 ) = ( - 2 )
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 Ответ минус 2