Making Change with Friendly Numbers

This video tutorial teaches how to solve money word problems using a number line. It introduces the concept of friendly numbers, which are numbers ending in zero, making them easier to work with. The tutorial walks through two examples: Matt's change from a $20 bill after buying a $7 game, and Hannah's change from $1 after buying $0.65 ice cream. The video emphasizes counting spaces between lines on a number line and using friendly numbers to simplify calculations.

What is the primary purpose of using a number line in money word problems?

• To memorize number sequences

• To help visualize and solve problems involving change

• To practice drawing straight lines

• To make numbers look more interesting

Which of the following is considered a friendly number?

• 40

• 57

• 89

• 23

Why are friendly numbers useful in calculations?

• They are easier to add and subtract

• They are larger than other numbers

• They are always even numbers

• They are more colorful

How much change does Matt receive after buying a board game for $7 with a $20 bill?

• $10

• $13

• $7

• $20

What is a common misunderstanding when counting on a number line?

• Counting only even numbers

• Counting backwards

• Counting the spaces instead of the lines

• Counting the lines instead of the spaces

How much change does Hannah get back after buying ice cream for $0.65 with $1?

• $0.15

• $0.25

• $0.35

• $0.45

What is the first step in solving Hannah's change problem using a number line?

• Start at 65 and hop to the next friendly number

• Start at 0 and count to 65

• Start at 50 and hop to 100

• Start at 100 and count backwards