Question

2. Calculati: a) 13/8 + 2/8 - 5/8 =
b)2/5 - 3/11 =
c)1/5 + 5/13 - 3/14 =

3.Aflati numarul natural x pentru care fractiile 31/17 si 62/x-2 sunt echivalente.

4.Transformati in fractii ordinare numerele: 15,26 , 0,(8) , 4,29(5)

Vreau rezolvazile la toate corect, dau coroana.

Answer 1

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Answer 2

2. Calculati:

a) 13/8 + 2/8 - 5/8 = (13 + 2 - 5)/8 = 10/8 = 5/4

b) 2/5 - 3/11 = (22 - 15)/55 = 7/55

c) 1/5 + 5/13 - 3/14 = (182 + 350 - 195)/910 = 337/910


3) 31/17 =  62/(x-2)

31(x - 2) = 17 · 62

31x - 62 = 1054

31x = 992

x = 32


4) 15,26 = 1526/100 = 763/50

0,(8) = 8/9

4,29(5) = 3866/900 = 1933/450