Unit 5: Making Change, Time & Perimeter

# Topic B: Making Change

When you make change, your first goal is to get a number that ends in 0 or 5. So for example, if you bought something for 53¢, the first thing to do would be to get to 55¢.  Check out example A below.

Example A: 53¢ to 55¢

To get from 53¢ to 55¢, you would need 2 pennies.

Example B: 20¢ to 25¢

To get from 20¢ to 25¢, you would 1 nickel.

Example C: 50¢ to 75¢

to get from 50¢ to 75¢, you would need 1 quarter.

Exercise One

Circle the number of coins you would need to get from the first number to the second number. Make sure to use the least number of coins you can. Check your work using the answer key at the end of the exercise.

1. \$0.35 to \$0.40
2. \$0.60 to \$0.70
3. \$0.80 to \$0.90
4. \$0.30 to \$0.40
5. \$0.15 to \$0.25
6. \$0.25 to \$0.50
7. \$0.50 to \$0.75

1. 1 nickel
2. 1 dime
3. 1 dime
4. 1 dime
5. 1 dime
6. 1 quarter
7. 1 quarter

Exercise Two

State the number and kind of coins you would need to get from the first number to the second number. Make sure you use the least number of coins as possible. Check your work using the answer key at the end of the exercise.

Example \$0.56 to \$0.60

4 pennies to get to \$0.60

1. 35¢ to 45¢
2. 90¢ to 95¢
3. 25¢ to 50¢
4. 25¢ to 50¢
5. 65¢ to 75¢
6. 40¢ to 45¢
7. 75¢ to 1.00\$
8. 5¢ to 15¢
9. 55¢ to 65¢
10. 20¢ to 25¢
11. 50¢ to 75¢
12. 25¢ to 75¢
13. 85¢ to 95¢
14. 50¢ to \$1.00
15. 95¢ to \$1.00
16. 45¢ to 50¢

1. 1 dime
2. 1 nickel
3. 1 quarter
4. 1 quarter
5. 1 dime
6. 1 nickel
7. 1 quarter
8. 1 dime
9. 1 dime
10. 1 nickel
11. 1 quarter
12. 2 quarters
13. 1 dime
14. 2 quarters
15. 1 nickel
16. 1 nickel

Example D: 28¢ to 50¢

You would need 2 pennies to get to 30¢. Then you would need 2 dimes to get to 50¢.

Example E: 36¢ to 50¢

You would need 4 pennies to get to 40¢. Then you would need 1 dime to get to 50¢.

Example F: 60¢ to 75¢

You would need 1 nickel to get to 65¢. Then you would need 1 dime to get to 75¢.

OR

You could also begin with 1 dime to get to 70¢. Then you would need 1 nickel to get to 75¢.

Exercise Three

State the number and kind of coins you would need to get change from \$1.00. Make sure you use the least number of coins as possible. Check your work using the answer key at the end of the exercise.

1. 2 oranges cost 70¢

2 quarters, 2 dimes
2. 2  pencils cost 75¢
3. 1 roll of toilet paper costs 30¢
4. a can of sardines costs 80¢
5. 1 lemon costs 40¢
6. a bagel costs 55¢
7. a roll of paper towels costs 80¢
8. a jar of baby food costs 75¢
9. a box of Kleenex costs 80¢
10. a bag of candy costs 70¢

1. 3 quarters
2. 1 quarter, 1 nickel
3. 3 quarters, 1 nickel
4. 1 quarters, 1 dime, 1 nickel
5. 2 quarters, 3 dimes
6. 3 quarters, 1 nickel
7. 3 quarters
8. 3 quarters, 1 nickel
9. 2  quarters, two dimes

Exercise Four

State the number and kind of coins you would need to get change from \$1.00. Make sure you use the least number of coins as possible. Check your work using the answer key at the end of the exercise.

1. Mrs. Bakshi bought two flower pots that cost 85¢. What change will she get from \$1.00?
2. Poloma bought a can of cat food for 70¢. What change will she get from \$1.00?
3. Two apples cost 60¢. What change will you get from \$1.00?
4. A pen costs 65¢. What change will you get from \$1.00?

1. 2 pennies, 1 dime
2. 4 pennies, 1 quarter
3. 4 pennies, 2 dimes
4. 1 penny, 1 nickel, 1 quarter

# Topic B: Self-Test

Mark     /21    Aim 17/21

1. Circle the number of coins needed to get from the first number to the second number.  Use the least number of coins. (4 marks)
1. 75¢ to 80¢
2. 20¢ to 25¢
3. 40¢ to 50¢
4. 50¢ to 75¢
2. State the number and kind of coin needed to get from the first number to the second number. (4 marks)
1. 40¢ to 50¢
2. 70¢ to 75¢
3. 90¢ to \$1.00
4. 25¢ to 50¢
3. State the number and kind of coins you would need to get from the first number to the second number. Make sure you use the least number of coins as possible. (4 marks)
1. 35¢ to 50¢
2. 15¢ to 50¢
3. 50¢ to 75¢
4. 80¢ to \$1.00
4. State the number and kind of coins you would need to get change from \$1.00. Make sure you use the least number of coins as possible. (9 marks)
1. 20¢
2. 40¢
3. 75¢
4. 70¢
5. a plastic beach shovel costs 90¢
6. 2 plums cost 60¢
7. a head of lettuce cost 55¢

## Answers to Topic B Self-Test

1. 1 nickel
2. 1 nickel
3. 1 dime
4. 1 quarter
1. 1 dime
2. 1 nickel
3. 1 dime
4. 1 quarter
1. 1 nickel, 1 dime
2. 2 dimes, 1 quarter
3. 1 quarter
4. 2 dimes
1. 3 quarters, 1 nickel
2. 2 quarters, 1 dime
3. 1 quarter
4. 1 nickel, 1 quarter
5. 1 dime
6. 1 quarter, 1 nickel, 1 dime
7. 2 dimes, 1 quarter