Question

Bună! Ma poate ajuta cineva ?​

Answer 1

Răspuns:

5/6+2/9=(3×5+2×2)/18=(15+4)/18=19/18

5/6-2/9=15-4)/18=11/18

13/6+b=3,,b=3-13/6=(18-13)/6=5/6

13/6-5/6=(13-5)/6=8/6=4/3

7/8-b=1/2 ,-b=1/2-7/8=(4-7)/8=(-3/8) b=3/8

7/8+3/8=10/8=5/4

7/8-3/8=4/8=1/2

a+3/10=2 a=2-3/10=(20-3)/10=17/10

17/10-3/10=14/10=7/5

a-13/12=2/3 a=2/3+13/12=(4×2+13)/12=(8+13)/12=21/12=7/4

7/4+13/12=3×7+13)/12=(21+13)/12=34/12=17/6