Question

Simplificati prin 5 urmatoarele fractii:10 supra 15;15 supra 45;5a supra 10 b;10 a+10b supra 25x+25y;2 la 2×5 supra 3×5

Answer 1

Răspuns

Explicație pas cu pas:

10 / 15 = ( 10 : 5 ) / ( 15 : 5 ) = 2 / 3

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15 / 45 = ( 15 : 5 ) / ( 45 : 5 ) = 3 / 9;    3 / 9 se simplifica prin 3 = 1 / 3

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5 a / 10 b = ( 5 a : 5 ) / ( 10 b : 5 ) = a / 2 b

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( 10 a + 10 b ) / ( 25 x + 25 y ) =

= ( 10 : 5 ) ( a + b ) / ( 25 : 5 ) ( x + y ) =

= 2 ( a + b ) / 5 ( x + y ) =

= ( 2 a + 2 b ) / ( 5 x + 5 y )

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( 2² x 5 ) / ( 3 x 5 ) = ( 4 x 5 : 5 ) / ( 3 x 5 : 5 ) = 4 / 3