large lot mid century vintage arithmetic flash cards math equations w/ correct answers

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Mid century vintage arithmetic flash cards - this is a mix of several incomplete sets, I think. Cards are nice and big, but have some browning and spotting. Each card has math problems in two levels of difficulty (one equation each side), with the answers.

sku: #wr072735
price: $30.50
status: in stock
quantity available: 1
circa: mid century vintage
maker/brand: Whitman

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