20 + 5 =, 25, 15, 38 - 8 =, 16, 30, 63 - 3=, 60, 3, 22 - 2 =, 24, 20, 46 - 6 =, 40, 52, 70 + 1 =, 73, 71, 87 - 7 =, 80, 94, 33 + 2 =, 25, 35, 98 - 6 =, 92, 100, 29 - 8=, 21, 30

Adding and subtracting ones2

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