1. How do you find out how many lollipops Jack and Jill have using an equation with a letter representing Jill’s lollipops? Jack has 28 lollipops. Jill has 12 fewer. How many lollipops do they have in all?

2. In this lesson you will learn to solve two step story problems by using letters to represent unknown quantities in equations.

3. Let’s Review read who what draw re-read compute answer

4. Let’s Review 28 12 ? Jack and Jill have 44 lollipops in all. 28 - 12 = 16 16 + 28 = 44 Jack has 28 lollipops. Jill has 12 fewer. How many lollipops do they have in all?

5. Let’s Review A Common Mistake Not using the answer to the first of a two part story in the second part!

6. Let’s Review Core Lesson Jack has 28 lollipops. Jill has 12 fewer. How many do they have in all? read who what Jack 28 Jill 28 - 12 = ? The ? can be named L to represent the lollipops This is called a variable.

7. Let’s Review Core Lesson Jack has 28 lollipops. Jill has 12 fewer. How many do they have in all? read who what Jack 28 Jill 28 - 12 = L compute 28 - 12 = 1 6

8. Let’s Review Core Lesson Jack has 28 lollipops. Jill has 12 less. How many do they have in all? Jack 28 + Jill 16 re-read compute answer 28 + 16 = 44 Jack and Jill have 44 lollipops in all.

9. Let’s Review Core Lesson Zach wants to ride his bike 50 miles. He rides 5 miles each day. After 7 days how many miles does he have left? read who what Zach’s goal = 50 miles Zach road 7 days 5 miles each 7 x 5= M compute 7 x 5= 35

10. Let’s Review Core Lesson 7 X 5 =35 miles so far 50 - 35 = M re-read Zach wants to ride his bike 50 miles. He rides 5 miles each day. After 7 days how many miles does he have left? compute Zach has 15 miles left to reach his goal. answer 50 - 35 = 15

11. In this lesson you have learned to solve two step story problems by using letters to represent unknown quantities in equations.

12. Let’s Review Guided Practice At the beach 3 kids found 8 sand dollars each. Mom found 4 sand dollars. How many sand dollars did the family find? What: 3 kids 8 sand dollars each Mom has 4 sand dollars

13. Let’s Review Guided Practice What: 3 kids 8 sand dollars each Mom has 4 sand dollars

14. Let’s Review Extension Activities Work with a partner to write multi-step story problems. 1. Write one with addition and subtraction. 2. Write one with multiplication and addition. 3. Write one with multiplication and subtraction. 4. Write one with division and subtraction. Solve your friend’s story problems. Show your work. Use letters for the unknown. Follow the order of operations. Compare and discuss your work with a friend.

15. Let’s Review Extension Activities Challenge…write a story problem that includes multiplication and division! Try it to prove your answer. Ask a friend to try. Discuss and compare your strategies and solutions.

16. Let’s Review Quick Quiz Select the equation that matches how many popsicles we have.  80 + 36 + N = 24  80 + 36 - 24 = N  36 + 24 + N = 80  N - 80 + 36 = 24 80 people are coming to the picnic. We have 36 red popsicle. We have 24 grape popsicles. How many more do we need?