A)
1) 4 14/15 + 3 1/15 = 8
2) 1 7/32 * 8 = 8 7/4=9 3/4
3) 10 5/9 - 9 3/4 =10 20/36 - 9 27/36 = 9 56/36 - 9 27/36 =29/36
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б)
1) 2 3/8 - 1 5/6 = 2 9/24 - 1 20/24 = 1 33/24 - 1 20/24 =13/24
2) 1/13 * 13/24 = 1/24
3) 1/24 * 2 2/5 = 1/24 * 12/5 = 1/10
4) 1/10 + 9/10 =10/10 = 1