Răspuns:
Explicație pas cu pas:
1)
3 - 1/3 = 9/3 - 1/3 = 8/3
2 - 1/2 = 4/2 - 1/2 = 3/2
1 1/2 = 3/2
(8/3)² + (3/2)² - (3/2)² = (8/3)² = 64/9 (c din coloana B)
2)
1/2 + 2/3 + 5/6 = 3/6 + 4/6 + 5/6 = 12/6 = 2
2*7/12 = 7/6 = 1 1/6 (a din coloana B)
3)
2 1/2 = 5/2
2/3 - 4/9 = 6/9 - 4/9 = 2/9
5/2*2/9 = 5/9 (d din coloana B)