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When it comes to money math, show scholars that estimation is their best friend. They round money values to the closest dollar, 10 dollar, and 100 dollar increments, solving 19 addition and subtraction problems with approximate answers. Each answer is preceded with "is about" to reinforce this concept. There are examples to show learners how to round both single-digit dollar amounts and double-digit amounts. Encourage them to think about when this skill would be useful, and ask scholars why larger numbers are rounded more broadly than smaller numbers.