Question

efectuati

a. 2,(4)+3,1(2)

b. 0,(25)+3,4(5)

ajutati-ma va rog frumos

Answer 1

Răspuns:

167 / 30 ; 2006 / 495

Explicație pas cu pas:

a. 2 , ( 4 ) + 3 , 1( 2 ) =

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2, ( 4 ) = 2 intregi 4 / 9 = ( 2 x 9 + 4 ) / 9 =  22 / 9

3 , 1( 2 ) = ( 312 - 31 ) / 90 = 281 / 90

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22 / 9 + 281 / 90 =

= 220 / 90 + 281 / 90

= 501 / 90

= 167 / 30 ( am simplificat fractia cu 3 )

b. 0 , ( 25 ) + 3 , 4( 5 ) =

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0 , ( 25 ) = 25 / 99

3 , 4 ( 5 ) = (  345  - 3  ) / 90 = 342 / 90 = 19 / 5

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25 / 99 + 19 / 5 =

= 125 / 495 + 1881 / 495

= 2006 / 495