7th Grade Math

Multi-Part Lesson Review

Chapter Study Guide and Review 663

Convert Measurements

Convert Customary Units (Lesson 1B)

Complete.

9. 4 qt =  pt 10. 6 gal =  qt


10. 48 oz =  lb 12. 9 c =  pt


11. RUNNING Lenora runs 30,000 feet. How
    many miles does Lenora run?


12. ESTIMATION One bushel of apples weighs
    about 40 pounds. How many bushels of
    apples would weigh 1 ton?

EXAMPLE 1 Complete: 32 qt =  gal.

Since 1 gallon = 4 quarts, multiply by

1 gal

_4 qt.

32 qt = 32 qt ·

1 gal

_4 qt Multiply by

1 gal

_4 qt.

8

= 32 qt ·

1 gal

_

4 qt

Divide out common factors

and units.

1

= 8 gal Multiply.

Convert Metric Units (Lesson 1C)

Complete. Round to the nearest hundredth

if necessary.

15. 18.25 m =  cm 16. 113.6 g =  kg


16. 24 L =  mL 18. 34 cm =  mm


17. MASS Kirk found the mass of his
    textbook to be 1.02 kilograms. What is
    the mass of the book in grams?

EXAMPLE 2 Complete: 3.8 km =  m.

Use the relationship 1 km = 1,000 m.

1 km = 1,000 m

3.8 × 1 km = 3.8 × 1,000 m

3.8 km = 3,800 m

So, 3.8 kilometers is equal to 3,800 meters.

Convert Between Systems (Lesson 1D)

Complete. Round to the nearest hundredth

if necessary.

20. 18.25 ft ≈  m 21. 113.6 lb ≈  g


21. 24 L ≈  gal 23. 46.8 cm ≈  in.


22. RUNNING Justine ran a 10-kilometer race.
    About how many miles did she run?


23. BIRDS The world’s largest bird is the
    ostrich, whose mass can be as much as
    156.5 kilograms. What is the approximate
    weight in pounds?

EXAMPLE 3 Complete: 5.2 mi ≈  km.

Use the relationship 1 mi ≈ 1.61 km.

1 mi ≈ 1.61 km

5.2 × 1 mi ≈ 5.2 × 1.61 km

5.2 mi ≈ 8.372 km

So, 5.2 miles is approximately

8.37 kilometers.

Lesson 1

662_666_C11_SGR_895130.indd 663 12/30/09 4:43 PM