13-03-2016
Mathematics

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There are 23 classes in the fourth grade. Each grade has 21 students. Write a number sentence that will provide a reasonable estimate for the number of students in the fourth grade. Explain how you found your estimate.

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14-03-2016

23 can round to 20 and 21 can also round to 20 so all u do is 20x20=400 so 400 is your estimated answer

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