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2014-08-22T17:04:21+03:00
12 3/4=  51/4

7,2= 7 2/10= 7  1/5= 36/5

0,(2)= 2/9

51/4 - 36/5 -2/9  aducem la acelasi numitor

(2295 -1296-40)/180=  959/180
1 5 1
2014-08-22T17:14:56+03:00
12 3pe4=  51pe4
7,2= 7 2pe10= 71pe5= 36pe5
0,(2)= 2pe9
51pe4 - 36pe5 -2pe9  totul se aduce la acelasi numitor
(2295 -1296-40)pe180=  959pe180