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I can solve multiplication and division word problems using drawings and equations with a variable. 4.M.OA.02

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Page 1: I can solve multiplication and division word problems using drawings and equations with a variable. 4.M.OA.02

I can solve multiplication and division word problems using

drawings and equations with a variable.

4.M.OA.02

Page 2: I can solve multiplication and division word problems using drawings and equations with a variable. 4.M.OA.02

Vocabulary

Equation – a math statement that says that two expressions have the same value (any number sentence with a equal sign)

7 – 3 = 10 – 6 4 = 4

Page 3: I can solve multiplication and division word problems using drawings and equations with a variable. 4.M.OA.02

Vocabulary

Variable – a symbol for a number we don’t know yet. It is usually a letter like x or y.

7x = 35 (x is the variable)

Represent – to take the place of (example: a variable represents an unknown number)

Page 4: I can solve multiplication and division word problems using drawings and equations with a variable. 4.M.OA.02

Vocabulary

Multiplication Strategies:Repeated Addition: 2 x 4 = 2+2+2+2 = 8Array: 2 (rows) x 4 (in each row)

xxxx = 8xxxx

Groups of: 2 (groups) x 4 (in each group) = 8

Page 5: I can solve multiplication and division word problems using drawings and equations with a variable. 4.M.OA.02

Vocabulary

Division Strategies:Repeated Subtraction: 12 ÷ 4 = 3

12 – 4 = 8 – 4 = 4 – 4 = 0 1 2 3

Equal Groups: 12 (split evenly between all groups) ÷ 4 (# of groups)

= 3 (# in each group)

Page 6: I can solve multiplication and division word problems using drawings and equations with a variable. 4.M.OA.02

Vocabulary

Solve – to find an answer to, explanation for, or means for dealing with a problem.

Draw/Model – draw a picture/model that can represent the problem. (Example: an array or equal groups)

Distinguish – to tell the difference between two things

Page 7: I can solve multiplication and division word problems using drawings and equations with a variable. 4.M.OA.02

Example Problem 1

A shirt costs $14. A jacket costs 7 times as much as a shirt. How much does the jacket cost?

Page 8: I can solve multiplication and division word problems using drawings and equations with a variable. 4.M.OA.02

Practice Problem 1

A pair of socks cost $4. A pair of shoes cost 11 times as much as the pair of socks. How much does the pair of shoes cost?

Page 9: I can solve multiplication and division word problems using drawings and equations with a variable. 4.M.OA.02

Example Problem 2

A jacket costs $75 and a shirt costs $15. How many times as much does the jacket costs as the shirt?

Page 10: I can solve multiplication and division word problems using drawings and equations with a variable. 4.M.OA.02

Practice Problem 2

A pair of shoes costs $52 and a pair of socks cost $4. How many times as much does the pair of shoes cost as the pair of socks?

Page 11: I can solve multiplication and division word problems using drawings and equations with a variable. 4.M.OA.02

Example Problem 3

Jamie got 28 gumballs and Lacey got 7 gumballs. How many times as much did Jamie get than Lacey?

Page 12: I can solve multiplication and division word problems using drawings and equations with a variable. 4.M.OA.02

Practice Problem 3

• Hayden got 36 stickers and Avery got 6 stickers. How many times as much did Hayden get than Avery?

Page 13: I can solve multiplication and division word problems using drawings and equations with a variable. 4.M.OA.02

Practice Problem 4

A baseball costs $6. A baseball bat costs 7 times as much as the baseball bat. How much does the baseball bat cost?

Page 14: I can solve multiplication and division word problems using drawings and equations with a variable. 4.M.OA.02

Practice Problem 5

A Disneyland ticket costs $90 and a LA Zoo ticket costs $15. How many times as much does the Disneyland ticket costs than the LA Zoo ticket?

Page 15: I can solve multiplication and division word problems using drawings and equations with a variable. 4.M.OA.02

Practice Problem 6

• Brandon drove 48 miles and Jeff drove 8 miles. How many times as much did Brandon drive than Jeff?

Page 16: I can solve multiplication and division word problems using drawings and equations with a variable. 4.M.OA.02

Make Your Own Problems

Create 2 of your own word problems that are similar to the ones we have been solving.

Trade your board with a neighbor and see if you can find the answer to one of their problems.

Trade your board with another neighbor and see if you can solve their second problem.

Page 17: I can solve multiplication and division word problems using drawings and equations with a variable. 4.M.OA.02

Think Back…

Tell your neighbor two different ways to solve a multiplication problem.

Explain what a variable is to a different neighbor.