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Derek Tiernan
plus.google.com/112011735706403519484
derektiernan
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Maths Talk
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2 Pins
·
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6mo
Math Ideas
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6 Pins
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1y
Fractions
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1 Pin
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7y
Multiplication tricks
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2 Pins
·
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7y
Derek Tiernan (derektiernan) - Profile | Pinterest
