Unit 2 Review

What is the difference of 401 and 174?

What is the sum of 279, 78, and 391?

1. What number belongs in the box to make this number sentence true?

       24 − □ = 15

• 9

• 11

• 13

• 39

A parking lot has 168 cars. There are 424 trucks. How many more trucks than cars are in the parking lot?

There are 715 students in a school. There are 378 students in math class and 167 students in reading class. The remaining students are at recess. How many students are at recess?

The chicken laid 32 eggs on a farm. 15 of the eggs have hatched. Which equation can be used to determine the number of eggs that have not yet hatched?

• 32 + 15 = ?

• 32 x 15 = ?

• 32 - 15 = ?

• 15 - ? = 32

A diagram is shown.

Which equation represents the diagram?

• 784 - 39 - 361 = x

• x = 784 + 361 + 39

• 784 + x = 39 + 361

• 39 - x - 361 = 784

A number line is shown.

What is the best estimate of the location of point P?

• 50, because P is more than halfway between 30 and 50

• 30, because P is less than halfway between 30 and 40

• 40, because P is more than halfway between 30 and 40

• 20, because P is less than halfway between 20 and 50

1. Sally, Mort, and Theo were picking oranges. Sally picked 271, Mort picked 428, and Theo picked 223. Which expression gives the best estimate of the total number of oranges they picked in all?

• 200 + 400 + 200

• 300 + 400 + 200

• 300 + 500 + 200

• 300 + 400 + 300

What is the total value of the money shown?

• $4.44

• $4.24

• $4.59

• $4.39