Word Problem Solving with Centimeters

In this lesson, students learn to solve word problems involving addition and subtraction using number lines. The video introduces the concept of using variables and diagrams to aid in problem-solving. It provides examples of identifying clue words to determine the correct operation and demonstrates solving problems with number lines. The lesson concludes with a preview of the next topic on measuring in centimeters and meters.

What is the purpose of using a square in the lesson?

• To represent a number line

• To prepare students for using variables in algebra

• To indicate subtraction

• To show the length of a line

Which clue word suggests that you should add in a word problem?

• Gave away

• Fewer

• Difference

• Together

In Sarah's ribbon problem, what operation is used to find the remaining ribbon?

• Division

• Addition

• Multiplication

• Subtraction

How many centimeters of ribbon does Sarah have left after giving some away?

• 21 cm

• 8 cm

• 29 cm

• 13 cm

What is the total length of string that Bob and Sujin have together?

• 16 cm

• 14 cm

• 8 cm

• 22 cm

In Bob and Sujin's problem, what operation is used to find the total length of string?

• Subtraction

• Addition

• Multiplication

• Division

How many centimeters of line did Dave erase?

• 9 cm

• 16 cm

• 25 cm

• 7 cm

What does the term 'erased' indicate in Dave's line problem?

• Division

• Multiplication

• Addition

• Subtraction

Which of the following is a related subtraction fact for Dave's line problem?

• 25 - 9 = 16

• 9 + 16 = 25

• 25 + 9 = 34

• 16 - 9 = 7

What is the benefit of using related subtraction facts?

• They are only used for addition

• They provide multiple ways to solve a problem

• They are not useful in problem-solving

• They make problems more complex