Вправи 901 - 1000 » 976
Виконайте віднімання: 1) 7/8 – (–3/10) = 7/8 + 3/10 = 47/40 = 17/40; 2) 11/12 – 17/18 = 11/12 + (–17/18) = 33/36 + (–34/36) = –1/36; 3) –3/7 – 9/14 = –3/7 + (–9/14) = –6/14 + (–9/14) = –11/14; 4) –5/9 – (–3/4) = –5/9 + 3/4 = –20/36 + 27/36 = 7/36; 5) 45/17 – 6 = 45/17 + (–517/17) = –112/17; 6) 13/8 – 31/4 = 13/8 + (–32/8) = –17/8.