Defining Variables Word Problems

After paying $5.12 for a salad, Nori has $27.10. How much money, m, did he have before buying the salad?

• m + $5.12 = $27.10

• $27.10 + $5.12= m

• $27.10= m- $5.12

• m = $27.10 - $5.12

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CCSS.HSA.CED.A.3

Sue bought 3 t-shirts for $8 each. She paid with a $50 bill. How could you find how much change,c, should she get back?

• 50 - (8x3) = c

• (8x3) + 50 = c

• cx3x8 = 50

• 8 + 3 + 50 = c

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CCSS.HSA.CED.A.3

Jim has one dollar. He spends 16 cents on a pencil. Jim's dad gives him five dollars for mowing the grass. Write an equation with a letter for the unknown to find out how much money Jim has now.

• 1.00 - .16 = m

• m =1.00

• $1.00 - $.16 + $5.00 = m

• 5 +1 + 16 = m

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CCSS.HSA.CED.A.3

Ronnie needs 101 cupcakes for a birthday party. He already has 21 chocolate cupcakes and 33 vanilla cupcakes. How could you find how many more cupcakes,c, should Ronnie buy?

• c=33 + 101 - 21

• 101- (33 +21) =c

• 101- (33-21) =c

• (33 - 21) + c =101

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CCSS.HSA.CED.A.3

18 A family spent $93 at a carnival. • They spent $18 on tickets to the carnival and $36 on food. • They spent the rest of the money on games. Which equation can be used to find g, the amount of money in dollars the family spent on games?

• F 93 = g + 36 − 18

• G 93 = 18 + 36 − g

• H 93 = 36 − 18 − g

• J 93 = g + 36 + 18

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CCSS.HSA.CED.A.3

Barry needs $1,449 for summer camp. Two local clubs will each match what he saves. Barry has 3 months before he leaves for summer camp. How much does Barry need to save on his own each month to have enough for summer camp?

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CCSS.6.EE.B.7

Brenda has 13 white buttons. She has 4 fewer brown buttons than white buttons. Brenda has 5 more gray buttons than brown buttons. How many gray buttons does Brenda have?

• (13 - 4) - 5

• (13 + 4) + 5

• (13 - 4) + 5

• (13 + 4) - 5

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CCSS.3.OA.D.8

Robert has 54 pencils. He has 1 box of pencils and 3 packages of pencils. The box has 24 pencils. Which equation can be used to find p, the number of pencils in each package?

• p = 54 + (3 x 24)

• 24 = 54 + (3 x p)

• 54 = 3 + (24 x p)

• 54 = 24 + (3 x p)

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CCSS.HSA.CED.A.3

WRITE AN EQUATION Aliyah had $24 to spend on pencils. After buying them she had $10. How much did she spend,s, on pencils?

• $24+$10=s

• $10-$24=s

• $24/s = $10

• $10+s= $24

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CCSS.HSA.CED.A.3

A variable represents what is ______________. 

• the answer

• the operation

• the difference

• unknown 

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CCSS.6.EE.B.6