Математика 6 класс рабочая тетрадь Ткачёва, Виленкин ответы – страница 53

а) –2,7 + (–1,9) = –(2,7 + 1,9) = –4,6;
б) –5,26 + (–4,74) = – (5,26 + 4,74) = –10;
в) –2/3+(–1/12)= –(2/3⁽⁴+1/12)=–(8/12+1/12)= –9/12= –3/4;
г) –35/16+(–111/12)= –(35/16⁽²+ 111/12⁽⁴)= –(315/48+ 144/48)= –459/48= –511/48.

а) –13 + (–42) и –21 + (–33);
–13 + (–42) = – (13 + 42) = – 55,
–21 + (–33) = – (21 + 33) = – 54, значит,
–13 + (–42) < –21 + (–33);

б) –26 + (–67) и –43 + (–57);
–26 + (–67) = – (26 + 67) = – 93,
–43 + (–57) = – (43 + 57) = – 100, значит,
–26 + (–67) > –43 + (–57).

а) (–100) + (+ 29) = – (100 – 29) = –71;
б) (–52) + (+ 97) = + (97 – 52) = 45;
в) (+ 25) + (–81) = – (81 – 25) = –56;
г) (+ 44) + (–28) = + (44 – 28) = 16.