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= 73/10 - 6/10
= 67/10 --> 6 7/10 (c)
2.) 5 4/5 - 2 1/3
= 29/5 - 7/3
= 87/15 - 35/15
= 52/15 --> 3 7/15 (c)
3.) 15,03
6,8
-------------- -
8,23 (a)