Помогите N439 зарание спасибо)
1) - 3/2+ (-1/3) = - 3+1 = - 4/6 6 2) - 1/4 + (-2/5) = - 1+2 = - 3/20 20 3) - 2/9 + (-9/4) = - 2+9 = - 11/36 36 4) -2/3 +(-2/7) = - 2+2 = - 4/21 21 5) - 1/3 + (-6/5) = - 1+6 = - 7/15 15 6) - 7/4 +(-3/7) = -7+3 = - 10/28 = - 5/14 28