Question

Un elev a citit 2 supra 6 fintr-o carte. Aflati cate treimi din carte mai are de citit.

Answer 1

2/6 + x/3 = 6/6
x/3 = 6/6 - 2/6
x/3 = (6-2)/6
x/3 = 4/6
x = 3×4/6
x = 12/6
x = 2

=> elevul mai are de citit 2 treimi din carte.

Scris altfel:

2/6 + x/3 = 3/3
1/3 + x/3 = 3/3
x/3 = 3/3 - 1/3
x/3 = 2/3
x= 3×2/3
x = 2

=> elevul mai are de citit 2 treimi din carte.

Answer 2

numarul total de pagini
|____|____|____|____|____|____|

a citit:
|____|____| 2/6 = 1/3 = o treime

a ramas de citit:
|____|____|____|____|4/6 = 2/3 = doua treimi mai are de citit

1/3 + 2/3 = 3/3
2/6 + 4/6 = 6/6