28 - 22 + 6 =, 19 - 16 + 3 =, 30 - 39 - 9 =, 54 - 45 + 9 =, 22 - 14 + 8 =, 44 - 6 +38 =, 7 - 4 - 3 + 6 =, 0 - 9 - 4 - 5 =, 9 - 2 + 5 + 2 =, 57 - 51 + 6 =,

Grade 1 - Count with Abacus

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