1. Measurement
Money
What will we learn today?
• addition and subtraction of money in
decimal notation
• solving word problems involving
addition and subtraction of money in
decimal notation.

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

4. 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

5. Try this out!
1. Tommy bought a pair of pants for $25
and two shirts for $18 each. He gave
the cashier two fifty-dollar notes.
How much change did she receive from
the cashier?

6. Try this out!
1. Tommy bought a pair of pants for $25
and two shirts for $18 each. He gave
the cashier two fifty-dollar notes.
How much change did she receive from
the cashier?

7. Try this out!
1. Tommy bought a pair of pants for $25
and two shirts for $18 each. He gave the
cashier two fifty-dollar notes. How much
change did she receive from the
cashier?
Step 1: 2 x $18 = $36 (2 shirts)

8. Try this out!
1. Tommy bought a pair of pants for $25
and two shirts for $18 each. He gave the
cashier two fifty-dollar notes. How much
change did she receive from the
cashier?
Step 1: 2 x $18 = $36 (2 shirts)
Step 2: $36 + $25 = $61 (shirts and pants)

9. Try this out!
1. Tommy bought a pair of pants for $25
and two shirts for $18 each. He gave the
cashier two fifty-dollar notes. How much
change did she receive from the
cashier?
Step 1: 2 x $18 = $36 (2 shirts)
Step 2: $36 + $25 = $61 (shirts and pants)
Step 3: 2 x $50 = $100

10. Try this out!
1. Tommy bought a pair of pants for $25
and two shirts for $18 each. He gave the
cashier two fifty-dollar notes. How much
change did she receive from the
cashier?
Step 1: 2 x $18 = $36 (2 shirts)
Step 2: $36 + $25 = $61 (shirts and pants)
Step 3: 2 x $50 = $100
Step 4: $100 - $61 = $39
She received $39 from the cashier.

11. Try this out!
2. What is the sum of $12.60 and $18.45?

12. Try this out!
2. What is the sum of $12.60 and $18.45?
12.60 Align the numbers
+ 18.45 accordingly.
Please make sure the
decimal point is aligned.

13. Try this out!
2. What is the sum of $12.60 and $18.45?
12.60
+1
12.60
+ 18.45 + 18.45
5 .05

14. Try this out!
2. What is the sum of $12.60 and $18.45?
12.60
+1
12.60 12.60
+ 18.45 + 18.45 + 18.45
5 .05 1.05

15. Try this out!
2. What is the sum of $12.60 and $18.45?
12.60
+1 +1
12.60 12.60 12.60
+ 18.45 + 18.45 + 18.45 + 18.45
5 .05 1.05 31.05

16. Try this out!
2. What is the sum of $12.60 and $18.45?
12.60
+1 +1
12.60 12.60 12.60
+ 18.45 + 18.45 + 18.45 + 18.45
5 .05 1.05 31.05
Answer: $31.05

17. Are you ready to
try out the
questions?

18. Visit kungfumath.sg today!