Question

Buna ziua as avea nevoie uregent de rezorvare pas cu pas b 5/3 - (-2/3) + 1/6 c 5/12 - (-5/6) + 1/3 d 3/11 + 1/5 - 7/55 e 2 intregi 1/4 - 5 + 2 intregi 3/4 f 102 intregi 1/8-15 intregi 3/4- 20intregi 1/2

Answer 1

Răspuns:

Explicație pas cu pas:

b) 5/3 - (-2/3) + 1/6 = 5/3 + 2/3 + 1/6 = (5+2)/3 + 1/6 =

= ²⁾7/3 + 1/6 = (14+1)/6 = 15/6⁽³ = 5/2

Am amplificat cu 2 , dupa care am simplificat cu 3

c) 5/12 - (-5/6) + 1/3 = 5/12 + ²⁾5/6 + ⁴⁾1/3 =

= (5+10+4)/12 = 19/12  (am adus la acelasi numitor 12)

d) ⁵⁾3/11 + ¹¹⁾1/5 - 7/55 = (15+11-7)/55 = 19/55

(am adus la acelasi numitor 55)

e) 2 intregi 1/4 - 5 + 2 intregi 3/4  = (2x4+1)/4 - 5 + (2x4+3)/4=

= 9/4 - 5 + 11/4 = (9+11)/4 -5 = 20/4 - 5 = 5-5 = 0

f) 102 intregi 1/8-15 intregi 3/4- 20intregi 1/2 =

= (102x8+1)/8 - (15x4+3)/4 - (20x2+1)/2 =

= 817/8 - ²⁾63/4 - ⁴⁾41/2 =

= (817 - 126 - 164)/8 = 527/8 = 65 intregi si 7/8