Question

Am nevoie urgent in cel mult 20 minute dau coroană ​

Answer 1

Răspuns:

Explicație pas cu pas:

a) (⁶⁾5/8 + ⁴⁾7/12 - ³⁾11/16) : (-7/16) = (30+28-33)/48 : (-7/16) =

= 25/48 · (-16/7) = - 25/21

c) (-²⁾2/9 + ³⁾5/6)·(-3/11) + (-7/36) ·(+2 si 4/7) =

= (-4+15)/18 ·(-3/11) - (7/36)· (18/7) =

= 11/18 · (-3/11) - 18/36⁽⁶ = - 1/6 - 3/6 = -4/6 = -2/3

d) (⁴⁾4/21 +³⁾5/28)·(-14) - (-3 si 1/2)·(-³⁾3/14 +1/42) =

= (16+15)/84 ·(-14) + (7/2)·(-8/42) =

= -31·14/84 - 56/84 = -490/84⁽² = -245/42⁽⁷ = -35/6

b) (-³⁾9/28 + ²⁾5/42 -⁴⁾8/21) : (-1 si 5/9) =

= (-27+10-32)/84 : (-14/9) = -49/84 · (-9/14) =

= 49·9/84·14 = 7·9/84·2 = 9/12·2 = 3/8