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Solve real world problems with addition and subtraction within 1,000. Warm up with a Mystery Math Mistake as you add two 2-digit numbers using a decomposition strategy. Use visual models and place ...

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If you claim you’ve never wondered why math exists, you’re either lying or have not been truly bored yet. Gracie Cunningham, a teenager who took to TikTok to muse about how early mathematicians came ...