A fraction like 5/8 is a sum of unit fractions: five 1/8s. To add or subtract fractions with the same denominator, add or subtract the numerators and keep the denominator. Mixed numbers work the same way, one whole at a time.
16 blocks · 5 graded
15 blocks · 5 graded
13 blocks · 4 graded
14 blocks · 5 graded
10 blocks · 1 graded
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