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Miss Caponigro had some students in her class. Some more students came halfway through the year, then some left before the end. How can you find the total number of students in her class at the end of the school year?

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Joe had some marbles, but gave some to Billy. Stacey has 2 times as many marbles as Joe has left. How can you find how many marbles Stacey has?

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Brad had some crackers to go with his soup. He ate some of them. Then he evenly shared the remaining crackers with his friend, John. How could you represent the number of crackers Brad has now?

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Write a numerical expression to represent: Double 5 then add 26 (2 x 5) + 26

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Write a numerical expression to represent 3 times the difference between 29 and 18 3x(29-18) or 3(29-18)

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Write a numerical expression to represent Twice as much as the sum of 2.5 and 4 2(2.5+4) or 2 x (2.5 x 4)

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Write a numerical expression to represent 5 less than the product of 7 and 8 (7 x 8) -5

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Write a numerical expression to represent 26 less the quotient of 22 and 11 26 – (22 ÷ 11)

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Write a numerical expression to represent 15 minus the sum of 6 plus 7 15 – (6 + 7)

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15n the quotient of 15 and n Harper wrote the expression 15n to represent “ the quotient of 15 and n”. Discuss with your partner why Harper is incorrect. Fix Harpers answer.

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Activator

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Write a numerical expression to represent 2 times the difference of 8 and 1 Then evaluate the expression 2(8 – 1)= 14

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Describe one way you could read the expression: 0.5 x (24 + 8) Half of the sum of 24 and 8

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Maria and her friend go to a movie. At a snack stand they each get a drink for $5 and popcorn for $8. Maria pays for her friend. Write an expression for the cost of a drink and popcorn for two people. Then evaluate the expression. (5 + 8) x 2 or (5 x 2) + (8 x 2) Maria pays $26

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the product of 3 and 2, plus 5 3 times the sum of 2 and 5 Write numerical expressions for “the product of 3 and 2, plus 5” and “3 times the sum of 2 and 5”. Which expression has a greater value? (3 x 2) + 5 = 11 3 x (2 + 5) = 21

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Carol sells bracelets and earrings at a craft fair. Each item sells for $8. Write and evaluate an expression to show how much money Carol makes if she sells 23 bracelets and 17 earrings. (23 + 17) x 8 = $320

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Jan purchased 8 pencils for school. She later decided she needed 7 more. She has made the same purchase before school for the last 6 days. Show how many pencils she has purchased with a numeric expression. (8 + 7) x 6

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Mara bought 6 bags of skittles at $0.85 each and 9 packs of gum at $1.20 each for a sleepover. Express what she purchased mathematically. (6 x 0.85) + (9 x 1.20)

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Yesterday, Mara bought 6 bags of skittles at $0.85 each and 9 packs of gum at $1.20 each for a sleepover. She still didn’t think she had enough snacks so she went back to the store and purchased the same number of items again. Expressed what she purchased mathematically. 2 x [(6 x 0.85) + (9 x 1.20)] 2 [(6 x 0.85) + (9 x 1.20)]

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How does the product of 30 x 3 compare to the product of 15 x 3? Compare the products without multiplying the numbers. Use a drawing to help. The product of 30 x 3 is double the product of 15 x 3 because 30 is two times greater than 15.

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How does the product of 3 x (4,564 + 354) compare to the sum of 4,564 + 354? The product is 3 times greater than the sum of 4,564 + 354.

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Write an expression that records the calculations below. Do not evaluate your expression Add 2 and 4 and multiply the result by 3. Add 5 to that product, then double the result.

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