Завдання 1001 - 1100 » 1035

Обчисли: 1) –17/8 + (–75/9) = –8(63 + 40)/72 = –931/72; 2) –411/12 + (–89/16)= – 12(44 + 27)/48 = –1271/48 = –1323/48; 3) –13/14 + (–24/63)=–3(27 + 8)/126 = –335/126 = –35/18; 4) –21/2 + (–0,65) = –21/2 + (–65/100) = –21/2 + (–13/20) = –2(10 + 13)/20 = –33/20; 5) –31/7 + (–2,8) = – 31/7 + (– 24/5) = –5(5 + 28)/35 = –533/35; 6) –32/3 + (–0,6) = – 32/3 + (–3/5) = –3(10 + 9)/15 = –319/15 = –44/15.