Пошаговое объяснение:
4/9 - 7/15 = 20/45 - 21/45 = -1/45
5/12 + 1/8 = 10/24 + 3/24 = 13/24
8/15 - 11/12 = 32/60 - 55/60 = -13/60
9/10 + 5/12 = 54/60 + 25/60 = 79/60 = 1 целая 19/60
13/12 - 13/18 = 39/36 - 26/36 = 13/36
11/30 + 8/45 = 33/90 + 16/90 = 49/90
11/20 - 9/16 = 44/80 - 45/80 = -1/80
8/33 + 9/77 = 56/231 + 27/231 = 83/231
9/98 - 5/56 = 36/392 - 35/392 = 1/392
13/750 + 7/450 = 39/2250 + 35/2250 = 74/2250 = 37/1125
10/297 - 14/363 = 110/3267 - 126/3267 = -16/3267
Пошаговое объяснение:
4/9 - 7/15 = 20/45 - 21/45 = -1/45
5/12 + 1/8 = 10/24 + 3/24 = 13/24
8/15 - 11/12 = 32/60 - 55/60 = -13/60
9/10 + 5/12 = 54/60 + 25/60 = 79/60 = 1 целая 19/60
13/12 - 13/18 = 39/36 - 26/36 = 13/36
11/30 + 8/45 = 33/90 + 16/90 = 49/90
11/20 - 9/16 = 44/80 - 45/80 = -1/80
8/33 + 9/77 = 56/231 + 27/231 = 83/231
9/98 - 5/56 = 36/392 - 35/392 = 1/392
13/750 + 7/450 = 39/2250 + 35/2250 = 74/2250 = 37/1125
10/297 - 14/363 = 110/3267 - 126/3267 = -16/3267
Пошаговое объяснение: