1. Changing Units in the Customary System

3. Strategy When converting from a large unit to a small unit, multiply by the conversion factor. When converting from a small unit to a larger unit, divide by the conversion factor.

4. Small - - - - - - - - Large Inch (in) ---------- Foot (ft)-------- Yard (yd) ------- Mile (mi) Ounce (oz) -------------- Pound (lb) -------------Ton (t) Fluid Ounce (fl. oz.) -- Cup (c) -- Pint (pt) -- Quart (qt) -- Gallon (gal)

5. Changing Units Determine the direction of the change (L  S or S  L) Multiply or Divide by the appropriate conversion unit.

6. Example 12 gal = ______ qt L  S x124(1 gal = 4 qt) 48

7. Example 2 40 in = ______ ft S  L ÷ 4012 3 1 3

8. Example 3 12 q = ______ c = ______ fl oz 12 x 4 = 48 48 x 8 = 384

9. Example 4 Comparing Convert to the same units then compare. 18 ft ______ 220 in Convert: 18 x 12 = 216 in Or Convert 220 ÷ 12 = 18.3 ft 18 ft ___<___ 220 in

10. Practice 9ft = in 10pt = qt 24 fl oz = c 32 qt = gal 3T = lb 3yd = in

11. 108 5 3 8 6000 108

12. Homework Time