Розділ 6. Звичайні дроби » 1031

Знайдіть різницю чисел: 1) 53/5 – 24/5 = (4 + (5/5 + 3/5)) – (2 + 4/5) = (4 – 2) + (8/5 – 4/5) = 2 + 4/5 = 24/5 2) 102/9 – 47/9 = (9 + (9/9 + 2/9)) – (4 + 7/9) = (9 – 4) + (11/9 – 7/9) = 54/9 3) 138/11 – 1110/11 = (12 + (11/11 + 8/11)) – (11 + 10/11) = (12 – 11) + (19/11 – 10/11) = 19/11 4) 172/15 – 87/15 = (16 + (15/15 + 2/15)) – (8 + 7/15) = (16 – 8) + (17/15 – 7/15) = 810/15 5) 2511/27 – 2419/27 = (24 + (27/27 + 11/27)) – (24 + 19/27) = (24 – 24) + (38/27 – 19/27) = 19/27 6) 4011/40 – 3912/40 = (39 + (40/40 + 11/40)) – (39 + 12/40) = (39 – 39) + (51/40 – 12/40) = 39/40