evaluate expressions ()
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100
Compare: Which expression gives you the answer 50? a. 10 × 5 – 10 b. 10 × (12 — 7)
What is B
100
Evaluate: 30 – (3 × 3) + 4
What is 17
100
Austin is 20 years old. Austin’s little brother, Josh, is half of Austin’s age minus one year. How old is Josh? Write and solve an expression to find Josh’s age.
What is (20/2) - 1 = 9
100
Rosa and Christina each bought flowers. Rosa spent $2.68 and Christina spent $3.75. How much money did they spend on flowers?
What is $2.68 + $3.75 = $6.43
100
Jessie measured the growth of his tomato plant. It has grown 8.6 inches in three weeks. If it grew 2.2 inches the first week and 3.11 inches the second week, how much did the plant grow during the third week? Explain how you found your solution.
What is 8.6 = 2.2 + 3.11 + x 2.2 + 3.11 = 5.31 8.6 – 5.31 = 3.29 inches; Explanations will vary. Sample Explanation: First I added the growth of the tomato plant during week one and two, 2.2 + 3.11 = 5.31 inches. Finally, I subtracted 5.31 from the total growth, 8.6 — 5.31 = 3.29.
200
Place the parentheses to produce the solution of 14 3 × 2 + 6 -10
What is (2+6)
200
Evaluate: 15 ÷ (5 × 3)
What is 1
200
A paper company produces 504 sheets of specialty paper each day. How many sheets are produced in 30 days? Thirty-six sheets placed in each package. How many packages of specialty paper are produced in 30 days? _________ Four packages are bundled in a box for shipping. Would 100 boxes be enough to ship all the packages? Explain.
What is 15,120 sheets; 420 packages; No, 5 more boxes would be needed.
200
Lori has a paper chain that is 4.5 feet long. If she takes off 1.75 feet of the paper chain, how long is the paper chain that remains?
What is 4.5 - 1.75 = 2.75
200
Karina buys a chocolate bar for $1.50 and a bag of chips for $2.25. She has $14.43 left. How much money did she start with? Explain how you found your solution.
What is $1.50 + $2.25 = $3.75 $3.75 + $14.43 = $18.18 $18.18; Explanations will vary. Sample Explanation: First I added the cost of the candy and chips, $1.50 + $2.25 = $3.75. Then, I added that sum to how much money was left, $3.75 + $14.43 = $18.18.
300
Compare: Which expression has the answer 32? a. 2 × (8 + 8) b. 2 + 6 × 4
What is A
300
Evaluate: (21 + 51) ÷ (12 – 3)
What is 8
300
Lucas is buying tickets to the movies. He and his friends want to see a matinee, which costs $7 per ticket. Lucas has $40. What is the greatest number of tickets Lucas can buy?
What is 5 tickets
300
5.36 + 1.92 =
What is 7.28
300
Sallie needs 10.75 feet of ribbon for a craft project. She has 3 pieces of ribbon. The first piece is 2.75 feet long, the second piece is 4.83 feet long, and the third piece is 1.91 feet long. Does Sallie have enough ribbon for her project? If not, how much more ribbon does she need? Explain how you solved the problem.
What is 2.75 + 4.83 + 1.91 = 9.49 feet 10.75—9.49 = 1.26 feet Explanations will vary. Since 9.49 < 10.75, Sallie does not have enough ribbon for her project. Since 10.75 - 9.49 = 1.26 feet, Sallie needs 1.26 feet more ribbon.
400
Place the parentheses to produce the solution of 4 60 ÷ 3 × 5
What is (3 x 5)
400
Evaluate: 6 + (5 × 4) - 7
What is 19
400
John is 3 years old. His big brother, Joey, is 1 year more than twice John’s age. How old is Joey? Write and solve an expression to find Joey’s age.
What is (3 × 2) + 1; Joey is 7 years old.
400
7.5 – 2.4 =
What is 5.1
400
Jonathon subtracted 2 numbers that had a difference of 12.67. He added 2 numbers that had a sum of 12.67. What numbers might he have subtracted and what numbers might he have added to arrive at the number 12.67?
What is For example: x – y = 12.67 34.58 – 12.67 = 21.91 34.58 – 21.91= 12.67 x + y = 12.67 12.67 – 8.34 = 4.33 8.34 + 4.33= 12.67
500
Compare: Which expression gives you the answer 100? a. 25 + 25 × 2 b. 50 × 2 — 0
What is B
500
Evaluate: (6 + 3) × 4
What is 36
500
Decide if the value of each expression given below is less than, equal to, or greater than 12. 1. (24 ÷ 4) × 2 2. (3 × 4) + 2 3. 20 – (6 × 2) 4. 25 – (6 × 2) 5. (3 × 2) + (12 ÷ 2) 6. (2 × 6) ÷ 3
What is 1) equal, 2) greater than, 3) less than, 4)greater than 5) equal, 6)less than
500
Brook and Karina need to buy string for their kites. Brook needs 4.15 yards of string and Karina needs 4.23 yards of string. How much string do Brooke and Karina need for their kites?
What is 4.15 + 4.23 = 8.38 yards
500
Maria subtracted 2 numbers that had a difference of 13.53. What numbers might she have subtracted to arrive at the number 13.53?
What is Choose a value more than 13.53 and subtract. This will give the students two numbers (the made up value and the difference) that can be subtracted from one another to make a difference of 13.53. Choose a value less than 13.53 and subtract. This will give the students two numbers that can be added together to make 13.53 (the made up value and the difference). For example: x – y = 13.53 26.14 – 13.53 = 12.61 26.14 – 12.61 = 13.53
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