Chapter 9 Review

Bella uses unit cubes to measure the length of the yarn. How many cm is the yarn?

• 4

• 5

• 6

• 1

The paintbrush is about 7 centimeters long. Cassie says the feather is about 8 centimeters long. George says the feather is about 5 centimeters long.

Who has the better estimate?

• Cassie

• George

Zach uses 8 centimeters of wire for a science project. He uses another 15 centimeters of wire for another project. How many centimeters of wire does he use?

• 15+8=23cm

• 15-8=7cm

• 15+8=20cm

• 8-15=7cm

A pencil is 16 ________ long

• centimeters

• meters

A swimming pool is 50 ________ long

• centimeters

• meters

A bed is 2 ________ long

• centimeters

• meters

A computer keyboard is 42 ________ long

• centimeters

• meters

Estimate the length of a real horse:

The horse is less than 1 meter long.

• Yes

• No

Estimate the length of a real horse:

The horse is less than 100 meters long.

• Yes

• No

Estimate the length of a real horse:

The horse is more than 3 centimeters long.

• Yes

• No