Join Mrs. Markavich for a missing addend word problem with Professor Barble! Next look out for two of favorite Math Might friends D.C. and Value Pak as they help use learn to add two-digit number in ...

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Before children can learn to add and subtract, they must learn which abstract symbol, like “4” or “6,” represents which quantity, a skill also known as number sense. Researchers know the intraparietal ...