1. Measurement
Money
What will we learn today?
• multiplication and division of money in
decimal notation
• solving word problems involving the 4
operations of money in decimal
notation
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. Kate bought a blouse and 2 skirts. She
gave the cashier $100 and got back $39.25
as change. A skirt cost twice as much as a
blouse. How much did a skirt cost?
(1) $12.15
(2) $20.25
(3) $24.30
(4) $40.50
12. Solution
2. Kate bought a blouse and 2 skirts. She
gave the cashier $100 and got back $39.25
as change. A skirt cost twice as much as a
blouse. How much did a skirt cost?
Step 1: $100- $39.25 = $60.75
13. Solution
2. Kate bought a blouse and 2 skirts. She
gave the cashier $100 and got back $39.25
as change. A skirt cost twice as much as a
blouse. How much did a skirt cost?
Step 2: $60.75 ÷ 5 = $12.15
Since a skirt cost twice as much as a blouse,
there are 5 units in total.
14. Solution
2. Kate bought a blouse and 2 skirts. She
gave the cashier $100 and got back $39.25
as change. A skirt cost twice as much as a
blouse. How much did a skirt cost?
Step 3: $12.15 x 2 = $24.30
Since a skirt cost twice as much as a blouse,
we have to multiply by 2, to get the cost of
the skirt.
15. Solution
2. Kate bought a blouse and 2 skirts. She
gave the cashier $100 and got back $39.25
as change. A skirt cost twice as much as a
blouse. How much did a skirt cost?
Step 3: $12.15 x 2 = $24.30
Answer: $24.30
