Solving Before and After Math Word Problems

This video tutorial explains how to solve a Primary school Before and After Math word problem using model drawing. The problem involves determining how many stamps Mike must give to Wayne so they both have the same number. The video breaks down the problem into three parts: the initial situation, the change, and the final situation. It uses a visual model to compare the number of stamps each boy has and calculates the difference. By dividing the difference, the solution is found, showing how many stamps need to be transferred.

How many stamps did Mike have initially?

• 56

• 28

• 130

• 74

Tags

CCSS.1.OA.A.1

What is a key characteristic of a Before and After problem?

• It only applies to stamp problems

• It has three parts: before, change, and after

• It involves multiplication

• It always involves subtraction

Tags

CCSS.1.OA.A.1

What change occurs in the problem involving Mike and Wayne?

• Both boys lose stamps

• Both boys gain stamps

• Mike gives stamps to Wayne

• Wayne gives stamps to Mike

Tags

CCSS.1.OA.A.1

What is the first step in drawing the comparison model?

• Subtract the number of stamps

• Add the number of stamps

• Decide who has more stamps

• Divide the stamps equally

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CCSS.1.OA.A.1

How do you represent the number of stamps Mike had in the model?

• With a triangle

• With a circle

• With a short bar

• With a long bar

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CCSS.2.MD.B.6

What is the difference in the number of stamps between Mike and Wayne?

• 28

• 130

• 56

• 74

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CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

What happens to Mike's number of stamps when he gives some to Wayne?

• It increases

• It doubles

• It decreases

• It stays the same

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CCSS.3.OA.D.9

What happens to Wayne's number of stamps when he receives some from Mike?

• It halves

• It stays the same

• It decreases

• It increases

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CCSS.2.OA.C.3

How many stamps must Mike give to Wayne for them to have the same number of stamps?

• 130

• 74

• 56

• 28

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CCSS.3.OA.D.8

What is the final step to solve the problem?

• Divide the difference by 2

• Multiply the stamps

• Subtract the stamps

• Add the stamps

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CCSS.7.EE.B.3