hannah brought $1 to buy ice cream at lunch. the ice cream only costs 65¢. how much change did she...
TRANSCRIPT
Hannah brought $1 to buy ice cream at lunch. The ice cream only costs 65¢. How
much change did she get back?
In this lesson, you will learn how to make change in money word
problems by adding up on a number line.
Let’s Review
Number Line
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
More
Less
Let’s Review
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
39 6141 51
Let’s Review
Friendly NumbersFriendly numbers are easy to work with.
Let’s Review
10 +3 = 13
40 + 8 = 48
90 + 2 = 92
Core Lesson
Matt takes a $20 bill to the store. He decided to buy a board game for $7. After he gives the
cashier his money, how much change should he get back?
What are the clues?
What am I trying to
figure out?
?
Core Lesson
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Matt takes a $20 bill to the store. He decided to buy a board game for $7. After he gives the
cashier his money, how much change should he get back?
Where is the money that he
should get back?
Is there a faster way to count the
numbers?
Core Lesson
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Is there a faster way to count the
numbers?Add up to the next friendly number!
3 10
+ = 13
Matt got $13 back in change.
A Common Misunderstanding
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
When we are making hops, we are counting the lines.
When we are making hops, we are counting the spaces between the lines.
3 10
13 spaces$13
Core Lesson
Hannah brought $1 to buy ice cream at lunch. The ice cream only costs 65¢. How much
change did she get back?
What are the clues?
What am I trying to
figure out?
?
Core Lesson
Hannah brought $1 to buy ice cream at lunch. The ice cream only costs 65¢. How much
change did she get back?
$1 = 100¢
65¢
Where should I put 100?
100¢
Core Lesson
65¢ 100¢70¢ 90¢80¢
Where is the change that she should get back?
What number should I hop to
first?
Hop to the next friendly number!
5
What is the next friendly
number?
10 10 10+ + + = 3535 spaces35¢
Hannah got 35¢ back in change.
In this lesson you have learned how to make change in money word problems by adding up
on a number line.