3+4 - 2+5, 10-1 - 11-2, 3+6 - 1+8, 4+4 - 5+3, 3+3 - 6+0, 4+1 - 2+3, 3+1 - 2+2, 2+1 - 0+3, 1+1 - 2+0, 5+6 - 9+2, 6+6 - 9+3, 10+3 - 8+5,

Math for 1st and 2nd grade (addition)

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