Вправи для повторення розділу 3 » 37

Обчисли та прочитай назву міста–героя України. 1) –21/2 + (–37/12) = –5/2 + (–43/12) = –(30 + 43)/12 = –73/12 = –61/12; (П) 2) –42/3 + (–17/8) = –14/3 + (–15/8) = –(112 + 45)/24 = –157/24 = –613/24; (Ь) 3) –35/6 + (–21/12) = (–5) + (–5/6 + (–1/12)) = –5(10 + 1)/12 = –511/12;(І) 4) –5/12 + (–55/24) = (–5) + (–5/12 + (–5/24)) = –5(10 + 5)/24 = –515/24 = –55/8; (Н) 5) –13/4 + (–45/12) = (–5) + (–3/4 + (–5/12)) = –5(9 + 5)/12 = –62/12 = –61/6; (Р)