Reasonable Answers with Decimals: Homework

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Estimate first, solve second, and then ask whether the answer makes sense. A claim that is ten times too big is not a rounding error.

What's Included?

• Nine multi-step problems: estimate, solve, then check
• A claimed answer with the decimal point in the wrong place
• Real marathon world record times, turned into seconds and speed

More Detail

• Nine multi-step problems: estimate, solve, then check
• A claimed answer with the decimal point in the wrong place
• Real marathon world record times, turned into seconds and speed
• Two puzzles about when an answer should worry you
• An answer key, and a blank total to add up and sign by hand

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