How many marshmallows were in the bag to begin with?
Solving Unknowns with Addition and Subtraction Fact Families
Interactive Video
•
Mathematics
•
1st - 6th Grade
•
Hard
Quizizz Content
FREE Resource
The video tutorial explains how to solve for unknown amounts using addition and subtraction fact families. It begins with a marshmallow problem and introduces the concept of fact families, showing how to write related equations. The tutorial covers solving for unknown addends and sums, highlights common mistakes, and applies these concepts to solve the initial problem. The lesson concludes with a summary of the key points.
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5 questions
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1.
OPEN ENDED QUESTION
3 mins • 1 pt
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2.
OPEN ENDED QUESTION
3 mins • 1 pt
Explain how to find the unknown addend in the equation 9 plus blank equals 22.
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3.
OPEN ENDED QUESTION
3 mins • 1 pt
What common mistake might someone make when solving for an unknown in a subtraction problem?
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4.
OPEN ENDED QUESTION
3 mins • 1 pt
What is the equation that represents the relationship between the number of marshmallows eaten and the number left?
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5.
OPEN ENDED QUESTION
3 mins • 1 pt
How can you represent the fact family for the numbers 26 and 7?
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