Lesson 10

Add Fractions

Est. Class Sessions: 2–3

Daily Practice and Problems

Teacher Notes
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TIMS Task

Use DPP item JJ to practice the multiplication facts for the 5s and 10s.

  1. Possible responses include: two $5.00 bills and four $10.00 bills; four $5.00 bills and three $10.00 bills; six $5.00 bills and two $10.00 bills; or eight $5.00 bills and one $10.00 bill.
  2. two; four $10.00 bills
  3. one; eight $5.00 bills
  4. four $5.00 bills and three $10.00 bills

JJ. Making Change

You want to make change for $50.00 using only $5.00 bills and $10.00 bills.

  1. How many $5.00 bills and $10.00 bills might there be? (Give several answers to this problem.)
  2. What is the fewest number of $5.00 bills you can use? How many $10.00 bills would there be?
  3. What is the fewest number of $10.00 bills you can use? How many $5.00 bills would there be?
  4. If you use exactly 7 bills to make change, how many will be $5.00 bills and how many will be $10.00 bills?