Question

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Answer 1

Ответ:

1) 12 3/8 + 8 1/6 = (12 + 8)+(3/8 + 1/6) = 20 + (9/24 + 4/24) = 20 13/24

2) 3 13/15 + 6 7/10 = (3+6) + (13/15 + 7/10) = 9 + (26/30 + 21/30) = 9 47/30 = 10 17/30

3) 8 4/9 + 7 3/4 + 12 7/12 = (8 + 7 + 12) + (5/9 + 3/4 + 7/12) = 27 + (20/36 + 27/36 + 21/36) = 27 + 68/36 = 27 + 17/9 = 27 + 1 8/9 = 28 8/9

4) 3 1/16 - 1/8 = 49/16 - 1/8 = 49/16 - 2/16 = 47/16 = 2 15/16

5) 7 9/20 - 5 17/30 =  7 27/60 - 5 34/60 = 1 53/60

6) 4 2/7 - 1 4/9 = 4 18/63 - 1 28/63 = 2 53/63

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