i can solve multiplication and division word problems using drawings and equations with a variable....
TRANSCRIPT
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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](https://reader035.vdocuments.us/reader035/viewer/2022080915/56649dba5503460f94aab446/html5/thumbnails/2.jpg)
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
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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)
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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
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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)
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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
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Example Problem 1
A shirt costs $14. A jacket costs 7 times as much as a shirt. How much does the jacket cost?
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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?
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Example Problem 2
A jacket costs $75 and a shirt costs $15. How many times as much does the jacket costs as the shirt?
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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?
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Example Problem 3
Jamie got 28 gumballs and Lacey got 7 gumballs. How many times as much did Jamie get than Lacey?
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Practice Problem 3
• Hayden got 36 stickers and Avery got 6 stickers. How many times as much did Hayden get than Avery?
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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?
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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?
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Practice Problem 6
• Brandon drove 48 miles and Jeff drove 8 miles. How many times as much did Brandon drive than Jeff?
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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.
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Think Back…
Tell your neighbor two different ways to solve a multiplication problem.
Explain what a variable is to a different neighbor.