18 - 20 - 2 =, 13 - 20 - 7 = , 10 - 20 - 10 =, 14 - 20 - 6 =, 23 - 30 - 7 =, 15 - 30 - 15 =, 25 - 40 - 15 =, 42 - 50 - 8 =, 29 - 50 - 21, 35 - 50 - 15 =,

Counting CUBES SUBTRACTION - 20 - 50 MINUS

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