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Changing Units in the Customary System Lesson 5-8 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. 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) Changing Units • Determine the direction of the change (LS or SL) • Multiply or Divide by the appropriate conversion unit. Example 48 12 gal = ______ qt LS 12 x 4 (1 gal = 4 qt) Example 2 40 in = ______ ft SL 40 ÷ 12 1 1 10 40 x 1 1 12 3 10 3 = 3 We can divide fractions so that remainders can be described as fractions. 1 3 Computing With Units • Combine or subtract like units. • Regroup. 19 7 8 feet 7 inches - 5 feet 11 inches 2 feet 8 inches 1 foot = 12 inches Homework Time