Б) 1/4m-1/3m+1/2m-1/6m = (1/4 - 1/3 + 1/2 - 1/6)m = (3/12 - 4/12 + 6/12 - 2/12)m = (3 - 4 + 6 - 2)/12m = 3/12m = 1/4m
B) -2/3y-5/21+1/7y+5/21y = (-2/3 + 1/7)y + (-5/21 + 5/21) = (-14/21 + 3/21)y = (-11/21)y = -11/21y
Б) 1/4m-1/3m+1/2m-1/6m = (1/4 - 1/3 + 1/2 - 1/6)m = (3/12 - 4/12 + 6/12 - 2/12)m = (3 - 4 + 6 - 2)/12m = 3/12m = 1/4m
B) -2/3y-5/21+1/7y+5/21y = (-2/3 + 1/7)y + (-5/21 + 5/21) = (-14/21 + 3/21)y = (-11/21)y = -11/21y