Five-Minute Check (over Lesson 11–7)

Main Idea and Vocabulary

Key Concept: Metric Units of Length

Example 1:Select an Appropriate Unit

Example 2:Convert Larger Units to Smaller Units

Example 3:Convert Smaller Units to Larger Units

Metric Rulers

• I will choose an appropriate metric unit for measuring length and convert metric units of length.

• metric system

• centimeter

• millimeter

• meter

• kilometer

Select an Appropriate Unit

Which unit would you use to measure the height of a street light pole: millimeter, centimeter, meter, or kilometer?

Answer: So, a meter is an appropriate unit of measure.

The height of a street light pole is much greater than the width of a pinky finger but much smaller than 6 city blocks.

1. A

2. B

3. C

4. C0% 0%0%0%

A. millimeter

B. centimeter

C. meter

D. kilometer

Which unit would you use to measure the width of a text book?

Convert Larger Units to Smaller Units

An art project required strips of paper 8 centimeters long. How many millimeters long is each strip?

Convert Larger Units to Smaller Units

You need to convert 8 centimeters to millimeters.

A larger unit (cm) is being converted to a smaller unit (mm), so you will multiply.

8 × 10 = 80 Since 1 cm = 10 mm, multiply 8 by 10.

Answer: So, 8 cm = 80 mm. The art project required strips of paper 80 millimeters long.

8 cm = mm

1. A

2. B

3. C

4. D0% 0%0%0%

A. 5 cm

B. 50 cm

C. 500 cm

D. 5,000 cm

Convert 5 meters to centimeters.

Convert Smaller Units to Larger Units

A high school track measures 250 meters. Luis ran 12 times around the track. How many kilometers did he run?

Step 1 Find the length in meters.

number of laps length of one lap total length

12 250 m 3,000 m× =

Convert Smaller Units to Larger Units

Step 2 Convert 3,000 meters to kilometers.

A smaller unit (m) is being converted to a larger unit (km), so you will divide.

3,000 ÷ 1,000 = 3 Since 1,000 m = 1 km, divide 3,000 by 1,000.

Answer: So, 3,000 m = 3 km. Luis ran 3 kilometers total around the high school track.

3,000 m = km

1. A

2. B

3. C

4. D0% 0%0%0%

A. 7 cm

B. 70 cm

C. 700 cm

D. 7,000 cm

Convert 70 millimeters to centimeters.

End of the Lesson

Five-Minute Check (over Lesson 11–7)

Image Bank

Math Tool Chest

Metric Rulers

1. A

2. B

3. C

4. D0% 0%0%0%

(over Lesson 11–7)

Find the elapsed time.

6:40 A.M. to 11:17 A.M.

A. 4 h 37 min

B. 4 h 35 min

C. 5 h 34 min

D. 5 h 32 min

1. A

2. B

3. C

4. D0% 0%0%0%

(over Lesson 11–7)

Find the elapsed time.

1:25 P.M. to 8:10 P.M.

A. 5 h 6 min

B. 5 h 12 min

C. 6 h 32 min

D. 6 h 45 min

1. A

2. B

3. C

4. D0% 0%0%0%

(over Lesson 11–7)

Find the elapsed time.

10:36 A.M. to 4:26 P.M.

A. 5 h 55 min

B. 5 h 50 min

C. 5 h 40 min

D. 6 h 10 min

1. A

2. B

3. C

4. D0% 0%0%0%

(over Lesson 11–7)

Find the elapsed time.

10:13 P.M. to 7:06 A.M.

A. 8 h 53 min

B. 8 h 52 min

C. 7 h 53 min

D. 7 h 57 min

1. A

2. B

3. C

4. D0% 0%0%0%

(over Lesson 11–7)

Find the elapsed time.

9:40 A.M. to 1:55 P.M.

A. 4 h 5 min

B. 4 h 15 min

C. 4 h 25 min

D. 4 h 35 min

1. A

2. B

3. C

4. D0% 0%0%0%

(over Lesson 11–7)

Find the elapsed time.

6:22 P.M. to 2:34 A.M.

A. 8 h 24 min

B. 8 h 16 min

C. 8 h 12 min

D. 8 h 6 min