Предмет: Математика, автор: ssssss66666pppppp000

срочно надо пожалуйста ​

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Автор ответа: zinaidazina
0

                         -(7,76-6\frac{8}{9})-(0,24-2\frac{1}{9} ) =?

1)  7,76-6\frac{8}{9}=7\frac{19}{25}-6\frac{8}{9}=(7-6)+( \frac{19}{25}-\frac{8}{9})=1+\frac{171-200}{25*9} = 1-\frac{29}{225}  =\frac{196}{225}

2)  -(\frac{196}{225} )= -\frac{196}{225}

3)   0,24-2\frac{1}{9} =\frac{6}{25} -2\frac{1}{9} =(0-2)+(\frac{6}{25} -\frac{1}{9} )=-2+\frac{54-25}{25*9} =-2+\frac{29}{225}=-1 \frac{196}{225}

4)  - \frac{196}{225} -(-1 \frac{196}{225} )=- \frac{196}{225} +1 \frac{196}{225} =1

Ответ:  1.

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