Grade 3 Unit 9 review

Alice estimates that a bag of onions weights 8 pounds. When she puts the bag on a scale, she sees that it weights 10 pounds. Which is true about Alice’s estimate?

• The estimate is exactly the right weight.

• The estimate is lighter than the actual weight.

• The estimate is heavier than the actual weight.

• The estimate is equal to the actual weight.

A teacher wants to know the height of some of her third grade students. In order to answer this question, the teacher should-

• find the actual height of the students using liters.

• estimate the students’ height using centimeters.

• find the actual height of the students using feet.

• estimate the students’ height using kilograms.

A jar holds 5 liters of juice. If Anton estimates that it holds 6 liters of juice, which is true about his estimate? The estimate is (a)   the actual amount.

• less than

• greater than

• equal to

According to the scale, about how much does this book bag weigh?

• 1 kilogram

• 2 kilograms

• 3 kilograms

• 4 kilograms

Which measurement is closest to the amount of water that a bathroom sink can hold?

• 5,000 cups

• 500 cups

• 50 cups

• 5 cups

Drag the area to the figure.

a

b

c

2.1 unit squares

21 unit squares

22 unit squares

20 unit squares

26 unit squares

Jane plans to put a fence around a vegetable garden. A model of the garden is shown. Each square in the model represents 1 square yard. Jane will need ​ (a)   yards of fencing to enclose her vegetable garden.

• 16

• 18

• 20

• 14

Claudia painted a picture as shown. Which measurement is closest to the perimeter of Claudia’s picture?

• 14 feet

• 12 feet

• 8 feet

• 6 feet

What is the perimeter of this polygon?

• 20 cm

• 24 in

• 20 in

• 24 cm