а) (1/6+2/3)*3
г) (1/2+1/3)*2

а) (1/6+2/3)*3=5/6*3=5/2г) (1/2+1/3)*2=5/6*2=5/3

а) (1/6 + 2/3) * 3 = (1/6 + 4/6) * 3 = 5/6 * 3 = 5/2 = 2 1/2б) (1/2 + 1/3) * 2 = (3/6 + 2/6) * 2 = 5/6 * 2 = 5/3 = 1 2/3