11. Раціональні числа - 14. Віднімання чисел » 551

Виконай віднімання а) 2/3 – 1/3 = 1/3; –1/3 – 2/3 = –3/3 = –1; 4/5 – (–3/5) = 7/5 = 12/5; –3/8 – (–1/8) = –2/8; б) 3/4 – 31/4 = –21/2; –6/7 – 23/7 = –29/7 = –32/7; –43/4 – 51/4 = –94/4 = –10; 23/8 – (–51/8) = 71/2; в) –3/8 – 1/6 = –9/24 – 4/24 = –13/24; 2/15 – (–1/10) = 4/30 – (–3/30) = 7/30; –22/3 – (–51/2) = –24/6 – (–53/6) = 25/6; 1/3 – 3,5 = 1/3 – 31/2 = 2/6 – 33/6 = –31/6.