5.3A / 5.4B Estimate to Solve, Represent and Solve

Mr. Maclane drove 577.2 miles. Ms. Lopez drove 165.4 miles. About how many more miles did Mr. Maclane drive than Ms. Lopez? (a)  

• 400 miles
• 300 miles
• 800 miles
• 700 miles

Shane spent $15.45 on a shirt, $21.99 on a pair of pants, and $12.15 on a hat. Which is the best estimate for the amount of money in dollars Shane spent? (a)  

• $40
• $50
• $70
• $60

Mr. Marquez had 123 eggs in a refrigerator in his restaurant. He put 32 more cartons of eggs in the refrigerator. Each carton contained 18 eggs. Which of these is the best estimate of the number of eggs Mr. Marquez now has in his refrigerator?

• 600

• 400

• 700

• 900

A basketball team scored points by making baskets worth different numbers of points during a game.

* The team made 6 baskets worth 3 points each.

* The team made 21 baskets worth 2 points each.

* The team scored 16 point by making baskets worth 1 point each.

This equation can be used to find p, the total number of points the basketball team scored during the game.

p = 6(3) + 21(2) + 16

What is the total number of points the basketball team scored during the game?

Mathematical Equivalence

ON

A business that rents cars is open for 8 hours on Monday. On Monday morning the business had 45 car.

* The business rented 3 cars to customers during each of the first 5 hours.

* The business rented 2 car to customers during each of the next 3 hours.

* The total number of cars that were brought back to the business by customers on Monday was 17.

In which equation does c represent the number of cars the business had at the end of the day on Monday?

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An elementary school had 90 boxes of glue sticks. Each box had 36 glue sticks. Teacher put all the glue sticks into bags to give to the students. They put 6 glue sticks in to each bag.

Which equation can used to find b, the number of bags the teachers can fill with these glue sticks?

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• $28

• $6

• $19

• $3