Завдання 1001 - 1100 » 1073

Знайди значення виразу: 1) –35/9 + 71/6 = 71/6 – 35/9 = 67/6 – 35/9 = 3(21 - 10)/18 = 311/18; 2) 72/9 + (–23/4) = 72/9 – 23/4 = 611/9 – 23/4 = 4(44-27)/36 = 417/36; 3) –45/6 + (–53/5) = –9(25 + 18)/30 = –943/30 = –1013/30; 4) –73/8 + 47/10 = –(73/8 – 47/10) = – (611/8 – 47/10) = –2(55 - 28)/40 = –227/40; 5) –10 + 87/13 = –(10 – 87/13) = –(913/13 – 87/13) = –16/13; 6) 75/9 + (–611/12) = 75/9 – 611/12 = 614/9 – 611/12 = (56 - 33)/36 = 23/36; 7) –3/4 + 3,6 = –0,75 + 3,6 = 3,6 – 0,75 = 2,85; 8) 2,05 + (–32/5) = 2,05 + (–3,4) = –(3,4 – 2,05) = –1,35; 9) –0,45 + (–21/4) = –0,45 + (–2,25) = –2,7; 10) –0,4 + 14/15 = – 2/5 + 14/15 – 2/5 = 19/15 – 6/15 = 13/15; 11) 42/3 + (–5,1) = 42/3 + (–51/10) = –(51/10 – 42/3) = –(411/10 – 42/3) = – (33 - 20)/30 = –13/30; 12) 21/6 + (–1,12) = 21/6 + (–13/25) = 21/6 – 13/25 = 1(25 - 18)/150 = 17/150.