Keira divided 123.52 by 3.2 and got 38.6. Without using a calculator, how could she check to determine if her answer is reasonable?
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Keira could use estimation to check her answer. 123.52 is about 120 and 3.2 is about 3. And 120 divided by 3 is 40. This is close to her answer, so it is reasonable.
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Sample Response: Keira could use estimation to check her answer. 123.52 is about 120 and 3.2 is about 3. And 120 divided by 3 is 40. This is close to her answer, so it is reasonable.
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