Question

efectuati;(1 intreg 8/13-7/13)*(8/35+18/35)

Answer 1

$(1 \times \frac{8}{13} - \frac{7}{13} )( \frac{8}{35} + \frac{18}{35} ) = ( \frac{1 \times 13 + 8}{13} - \frac{7}{13} ) \times \frac{26}{35} = ( \frac{21}{13} - \frac{7}{13} ) \times \frac{26}{35} = \frac{14}{13} \times \frac{26}{35} = \frac{14*26}{35*13}=\frac{4}{5}$

Answer 2

Răspuns: 4 / 5

Explicație pas cu pas:

1 intreg si 8 / 13 = ( 1 x 13 + 8 ) / 13 = 21 / 13

= ( 21 / 13 - 7 / 13 ) × ( 8 / 35 + 18 / 35 ) =

= 14 / 13   ×   26 / 35 =

= ( 14 / 35 ) × ( 26 / 13 ) =

= ( 14 : 7 ) / ( 35 : 7 ) ×  2 =

= ( 2 / 5 ) × 2 =

= 4 / 5