In January, third graders at Evans School read 279 books in all. In April, they read 403 books. How many more books did they read in April than in January? Use rounding to estimate the answer to this problem. Show your work and your estimate here.
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Find the actual difference. Show your thinking with numbers, sketches, or words. Use a strategy that is more efficient than counting on or counting backward by 1's.
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The third graders read____ more books in April than in January.
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Write an equation to match the problem that includes + or - and a = sign.
