Basic Arithmetic
Lesson 9 – Units & Conversions
Example 9: Raldo measured a room at 9 ft long x 10 ft wide to get an area measurement
of 90 square feet (area is length times width). He wants to carpet the room with new
carpet, which is measured in square yards. Raldo knows that 1 yd is equivalent to 3 ft so
he ordered 30 square yards of carpet. Did he order the correct amount?
YOU TRY
10. Perform each of the following conversions within the U.S. system. Round to tenths as
needed. Show complete work.
a. A young girl paced off the length of her room as approximately 8 feet. How many
inches would that be?
b. 18 oz = _____ lb
c. 100 yd = _____ ft
d. 10,235 lb = _____ tons
e. How many inches are in 6 feet, 8 inches?
f. How many square inches are in 10 square feet?
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