Номер 1073

1) –3 5/9 + 7 1/6 = 7 1/6 – 3 5/9 = 6 7/6 – 3 5/9 = 6 21/18 – 3 10/18 = 3 11/18

2) 7 2/9 + (–2 3/4) = 7 2/9 – 2 3/4 = 6 11/9 – 2 3/4 = 6 44/36 – 2 27/36 = 4 17/36

3) –4 5/6 + (–5 3/5) = –(4 25/30 + 5 18/30) = –9 43/30 = –10 13/30

4) –7 3/8 + 4 7/10 = –(7 3/8 – 4 7/10) = – (6 11/8 – 4 7/10) = –(6 55/40 – 4 28/40) = –2 27/40

5) –10 + 8 7/13 = –(10 – 8 7/13) = –(9 13/13 – 8 7/13) = –1 6/13

6) 7 5/9 + (–6 11/12) = 7 5/9 – 6 11/12 = 6 14/9 – 6 11/12 = (56 – 33)/36 = 23/36

7) –3/4 + 3,6 = –0,75 + 3,6 = 3,6 – 0,75 = 2,85

8) 2,05 + (–3 2/5) = 2,05 + (–3,4) = –(3,4 – 2,05) = –1,35

9) –0,45 + (–2 1/4) = –0,45 + (–2,25) = –2,7

10) –0,4 + 1 4/15 = 1 4/15 – 4/10 = 1 4/15 – 2/5 = 1 4/15 – 6/15 = 19/15 – 6/15 = 13/15

11) 4 2/3 + (–5,1) = –(5 1/10 – 4 2/3) = –(4 11/10 – 4 2/3) = – (4 33/30 – 4 20/30) = –13/30

12) 2 1/6 + (–1,12) = 2 1/6 + (–1 12/100) = 2 1/6 – 1 3/25 = 2 25/150 – 1 18/150 = 1 7/150

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