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https://www.quia.com/jg/796584.htmlFlash cards. |
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https://www.quia.com/jg/863677.htmlGames using basic subtraction. |
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https://www.quia.com/cm/106421.htmlDraw a line from the problem to the correct answer. |
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https://www.quia.com/quiz/715012.htmlQuiz over subtraction up to 10. |
