0,7 + 1/7 = 7/10 + 1/7 = (77 + 110)/(10*7) = 49 + 10)/70 = 59/70
7/16 - 0,12 = 7/16 - 12/100 = (35 - 1*16)/80 = 19/80
4.85 - 2 13/24 = 485/100 - (482 + 13)/24 = 485/100 - (96 + 13)/24 = 4.85 - 109/24 = (485 - 109100)/2400 = (485 - 10900)/2400 = -10415/2400 = -26 915/2400 = -26 43/800
7 8/21 - 6,375 = 7 + 8/21 - 51/8 = 7 + 32/168 - 63/8 = 7 + (32 - 63*21)/168 = 7 + (-1199)/168 = 7 - 1199/168 = (1176 - 1199)/168 = -23/168 = -23/168
0,7 + 1/7 = 7/10 + 1/7 = (77 + 110)/(10*7) = 49 + 10)/70 = 59/70
7/16 - 0,12 = 7/16 - 12/100 = (35 - 1*16)/80 = 19/80
4.85 - 2 13/24 = 485/100 - (482 + 13)/24 = 485/100 - (96 + 13)/24 = 4.85 - 109/24 = (485 - 109100)/2400 = (485 - 10900)/2400 = -10415/2400 = -26 915/2400 = -26 43/800
7 8/21 - 6,375 = 7 + 8/21 - 51/8 = 7 + 32/168 - 63/8 = 7 + (32 - 63*21)/168 = 7 + (-1199)/168 = 7 - 1199/168 = (1176 - 1199)/168 = -23/168 = -23/168