Question

vă rog . Dau coroana. repete și arătați cum ați făcut.​

Answer 1

(5/7+2/7)-6/8 = 7/7 - 6/8 = 1 - 6/8 = 8/8 - 6/8 = 2/8

(4/9 + 5/9) - 4/6 = 9/9 - 4/6 = 1 - 4/6 = 6/6 - 4/6 = 2/6

4*1/5 * 2*1/2 : 3/4 = 4/5 * 2/2 : 3/4 = 4/5 * 1 : 3/4 = 4/5 : 3/4 = 4/5 * 4/3 = 16/15

1*1/7 * 4*2/3 : 2/3 = 1/7 * 8/3 : 2/3 = 8/21 : 2/3 = 8/21 * 3/2 = 24 / 42 (simplificat cu 2) = 12/21