1. How can rounding help you solve word problems? For example: May’s mom gave her $58 to spend at the mall. She bought a sweater for $23, a shirt for $13 and a hat for $8. How much change will May get from the cashier?

2. In this lesson you will learn how to solve multi-step word problems by rounding on a number line.

3. Let’s Review All numbers have at least one of these digits:0, 1, 2, 3, 4, 5, 6, 7, 8, 9 l l l l l l l l l l l 010 1 2 3 45678 9

4. Let’s Review A Common Mistake Not knowing what place value to round to: l l l l l l l l l l l 320 330 325 l l l l l l l l l l l 300 400 350 323

5. Let’s Review Core Lesson Mary has a 296 page book to read. On Monday, she read 51 pages. On Tuesday, she read 74 pages. How many more pages does she have left to read?

6. Let’s Review Core Lesson Mary will read a total of 296 pages 290 300 295 l 296 About 300 pages in total

7. Let’s Review Core Lesson Monday: 51 pages Tuesday: 74 pages 5060 7080 55 75 l l 51 74 Monday: Tuesday: About 50 pages About 70 pages

8. Let’s Review Core Lesson Estimates: About 300 pages to read in all Monday: about 50 pages Tuesday: about 70 pages 70 + 50 = 120 pages already read 300-120= 180 pages left to read Answer should be around 180

9. Let’s Review Core Lesson Actual Answer: 51 + 74 = 125 pages already read 296 – 125 = 171 pages left to read Estimate: about 180 pages Actual answer: 171 pages left to read

10. In this lesson you have learned how to solve multi- step word problems by rounding on a number line.

11. Let’s Review Guided Practice May’s mom gave her $93 to spend at the mall. She bought a sweater for $23, a shirt for $13 and a hat. May received $46 for her change. How much was the hat?

12. Let’s Review Guided Practice Estimates: About $90 to spend at the mall Sweater: about $20 Shirt: about $10 Hat: ? Change: About $50 20 + 10 = 30 Price of sweater and shirt 50-30= 20 price of hat Answer should be around 20

13. Let’s Review Guided Practice Actual Answer: $23 + $13 = $36 for a sweater and a shirt $46 – $36 = $10 for the hat Estimate: about $20 for the hat Actual answer: $10 for the hat

14. Let’s Review Extension Activities Make an estimate before finding the answer. Mike’s mom gave him$103 to spend at the mall. Determine what Mike can purchase, leaving $26 for his lunch. Hat - $6Socks - 2 for $5 Shirt - $13Game - $32 Jacket - $32Birthday Card - $5 Shoes - $23Sunglasses - $20 Sneakers - $70Watch - $65 Tie - 2 for $30Cologne - $35

15. Let’s Review Extension Activities Create prices for various items at the mall for Jan to purchase. She will also need to have $13 set aside for lunch. Determine the total amount of money she has to spend and how she decides to spend this money.

16. Let’s Review Quick Quiz 1) Jenny and Kenny together have 41 marbles, and Kenny has 22. How many does Jenny have? Jenny loses 7, how does her amount of marbles compare to Kenny?

17. Let’s Review Quick Quiz 2) May’s mom gave her $250 to spend at the mall. She bought a dress for $68 and a jacket. She also bought lunch for her and her two friends for $15 each. She had $115 left to spend at the mall. How much was May’s jacket?