Assessing the Reasonableness of Subtraction Using Rounding

Interactive Video
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Mathematics
•
1st - 6th Grade
•
Hard
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5 questions
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1.
OPEN ENDED QUESTION
3 mins • 1 pt
What is one way to check if an answer is reasonable or makes mathematical sense?
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2.
OPEN ENDED QUESTION
3 mins • 1 pt
How do you determine which place to round to when assessing the reasonableness of subtraction problems?
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3.
OPEN ENDED QUESTION
3 mins • 1 pt
What rounding method was used to check Dana's subtraction problem?
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4.
OPEN ENDED QUESTION
3 mins • 1 pt
Why is it important to round both numbers to the same place when checking subtraction problems?
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5.
OPEN ENDED QUESTION
3 mins • 1 pt
Explain why Larry's answer of 971,000 was not reasonable after subtracting 38,000.
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