• Converting an amount of money in decimal notation to cents, and vice versa.

What will we learn today?

MeasurementMoney

Before we start, let’s learn some useful terms.

There are different denominations (value) of coins and notes we use in Singapore.

This is how we write cents.

fifty cents

50¢

This is how we write dollars.

two dollars

$2

has the same value as

has the same value as _____

has the same value as 5

Ali has 60¢. He bought an eraser and was left with 20¢. How much is the eraser?

Ali has 60¢. He bought an eraser and was left with 20¢. How much is the eraser?

60¢ - 20¢ =

Ali has 60¢. His father gives him 20¢ and his money gives him another 20¢. How much does he have now?

60¢ + 20¢ + 20¢ = 100 ¢

Ali has 60¢. His father gives him 20¢ and his money gives him another 20¢. How much does he have now?

60¢ + 20¢ + 20¢ = 100 ¢

Ali has 60¢. His father gives him 20¢ and his money gives him another 20¢. How much does he have now?

60¢ + 20¢ + 20¢ = 100 ¢

We can’t leave in cents.

Ali has 60¢. His father gives him 20¢ and his money gives him another 20¢. How much does he have now?

60¢ + 20¢ + 20¢ = 100 ¢

We have to convert cents into dollars.

Instead of writing 100 ¢ , we can represent the value by writing $1.

$1 is equal to 100 ¢

$1 is equal to 100 ¢.

which means

$2 is equal to 200 ¢.

1) $4 is equal to ____ ¢.

2) $2.50 is equal to ____¢.

3) $3.30 is equal to ____¢.

1) $4 is equal to 400 ¢.

2) $2.50 is equal to 250 ¢.

3) $3.30 is equal to 330 ¢.

1) 215¢ is equal to $____.

2) 120¢ is equal to $____.

3) 80¢ is equal to $____.

1) 215¢ is equal to $2.15

2) 120¢ is equal to $1.20

3) 80¢ is equal to $0.80

How do we write in cents and dollars

10 cents $0.10

20 cents $0.20

30 cents $0.30

40 cents $0.40

50 cents $0.50

60 cents $0.60

70 cents $0.70

80 cents $0.80

90 cents $0.90

1 dollar $1

Are you ready to try out the questions?