MAFS.2.MD.3.8 Solve one- and two-step word problems involving dollar bills (singles, fives, tens, twenties, and hundreds) or coins (quarters, dimes, nickels, and pennies) using $ and ¢ symbols appropriately. Word problems may involve addition, subtraction, and equal groups situations1. Example: The cash register shows that the total for your purchase is 59¢. You gave the cashier three quarters. How much change should you receive from the cashier?
c. Compute the value of any combinations of dollars (e.g., If you have three ten-dollar bills, one five-dollar bill, and two one-dollar bills, how much money do you have?).
(1See glossary Table 1)
Cognitive Complexity Level: 2 – Basic Application of Skills and Concepts
[divider] [/divider] Students are able to…
- Determine the value of any combination of coins within one dollar
- Determine the value of any combination of bills
- Solve one and two step word problems involving dollars OR coins
- Use the $ and ¢ symbols appropriately
[divider] [/divider] Students are able to…because teachers:
- Provide opportunities for students to use different combinations of coins to make a dollar
- Provide opportunities for students to find the value of coins within a dollar
- Provide word problems for students to solve using coins OR bills
- Provide concrete tools for students to use to solve word problems
- Allow students to discuss and compare their solutions
[divider] [/divider] Questions to ask students:
- Ask: I have 2 quarters, 1 dime, and 3 nickels in my wallet. How much money do I have?
- Sample answer that would indicate understanding: You have 75 cents in your wallet. 25 and 25 is 50 plus 10 is 60 then 65, 70, 75 (The student my draw the coins on a paper and then determine the value.)
- Sample answer that indicates an incomplete understanding or a misconception: You have 6 cents in your wallet. (The student may draw the coins and then just count the number of coins.)
- Ask: I bought candy for 83 cents. I gave the cashier 3 quarters and one dime. How much change should I get back?
- Sample answer that would indicate understanding: You should get 2 cents back. 3 quarters is 75 cents plus a dime is 85 cents. 85 minus 83 is 2.
- Sample answer that indicates an incomplete understanding or a misconception: The students may just say 85 cents, because they only find the value of 3 quarters and one dime.
[divider] [/divider] Additional Resources:
Additional in depth content knowledge
[divider] [/divider] Sample Formative Assessment Tasks:
Note: This task may be implemented individually, in small groups, or in a whole-group setting. If the task is given in a whole-group setting, the teacher should ask each student to explain his or her thinking and strategy.
- The teacher provides the student with the Combinations of Coins worksheet and reads aloud the directions.
- The teacher may provide the student with coins from a manipulatives set.
MFAS_CombinationsOfCoinsWorksheet.docx
Note: This task may be implemented individually, in small groups, or in a whole-group setting. If the task is given in a whole-group setting, the teacher should ask each student to explain his or her thinking and strategy.
- The teacher provides the student with the School Store worksheet and reads aloud the directions.
- The teacher asks follow-up questions as needed
MFAS_SchoolStoreWorksheet.docx
[divider] [/divider] Resources/Tasks to Support Your Child at Home:
- Using shopping ads, give your child story problems involving the money in the ad. Have them draw quick pictures or use actual money to model the problem and solve.
- Khan Academy: Counting Coins
- Khan Academy: Counting Dollars