black abacus icon isolated yellow background traditional counting frame education sign mathematics school warning |
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| navigate by keyword : abacus education wooden mathematics calculator tool traditional counting frame count vector icon isolated grunge warning danger vintage drawing black background wood object business flat accounting math finance retro calculation old school subtraction antique learning arithmetic mathematical ancient bead number concept equipment symbol financial work row chinese economy obsolete calculate beads |
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| Black Abacus icon isolated on yellow background. Traditional counting frame. Education sign. Mathematics school. Warning sign. Vector. |
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