Question

1 1/3+(-1/2)= 3 1/3+(-1 2/3)= -5/11+8/33= 3 2/5-(-3 3/5)= 9/11-3/44= 45 2/7-(-5/7)= помогите решить

Answer 1

вроде бы так, прости если неправильно!

Answer 2

1 + 1/3 + (-1/2) = (3/3) + (1/3) + (-1/2) = 4/3 + (-1/2) = (8/6) + (-3/6) = 5/6.

3 + 1/3 + (-1 + 2/3) = 3 + 1/3 + (-3/3 + 2/3) = 3 + 1/3 + (-1/3) = 3 + 1/3 - 1/3 = 3.

(-5/11) + (8/33) = (33*(-5))/ (11*33) + (8/33) = (-165/363) + (8/33) = (-165 + 264)/363 = 99/363.

3 + 2/5 - (-3 + 3/5) = 3 + 2/5 + (-15/5 + 3/5) = 3 + 2/5 + (-12/5) = 3 + 2/5 - 12/5 = 3 + (2-12)/5 = 3 + (-10/5) = 3 - 2 = 1.

(9/11) - (3/44) = (44*9)/(11*44) - (3/44) = (396/484) - (3/44) = (396 - 11*3)/484 = (396 - 33)/484 = 363/484 = 33/44 = 3/4.

(45 + 2/7) - (-5/7) = (319/7) - (-5/7) = (319 + 5)/7 = 324/7.

Суммы и разности этих выражений равны: 5/6, 3, 99/363, 1, 3/4, 324/7.