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# Changing Units in the Customary System Lesson 5-8.

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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 (L S or S L) Multiply or Divide by the appropriate conversion unit.

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

Example 2 40 in = ______ ft S L ÷ 4012 We can divide fractions so that remainders can be described as fractions. 11 x 401 112 10 3 3 = 3 1 3

Computing With Units Combine or subtract like units. Regroup. 8 feet 7 inches - 5 feet 11 inches 71 foot = 12 inches 19 2 feet 8 inches

Homework Time

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