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Changing Units in the Customary System

Learn how to convert units in the Customary System with this lesson from BrainPOP. Practice using conversion units and computing with units. Homework exercises provided.

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Changing Units in the Customary System

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  1. Changing Units in the Customary System Lesson 3-6

  2. Brainpop Quiz Customary Units http://www.brainpop.com/math/numbersandoperations/customaryunits/ www.brainpop.com

  3. Answers • C • A • D • B • B • D • D • A • C • C

  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 (LargeSmall or SmallLarge) • Multiply or Divide by the appropriate conversion unit. • LS then multiply • SL then divide

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

  7. Example 2 40 in = ______ ft S  L 40 ÷ 12 1 1 We can divide fractions so that remainders can be described as fractions. 10 40 x 1 1 12 3 10 3 1 = 3 3

  8. 10 2/3 10 yd 2ft = ______ yd Small to Large (ft to yd) Divide Keeps yards the same 2 / 3

  9. Computing With Units • Combine or subtract like units. • Regroup. 19 7 1 foot = 12 inches 8 feet 7 inches - 5 feet 11 inches 2 feet 8 inches

  10. Homework TimePg. 150 #2-28 even10-28 write if you’re going S->L or L->S, and if multiply or divide

  11. Bellringer MUST SHOW YOUR WORK!!!!! • 6 ½ ÷ 1 ½ = • 3 2/3 X 1 ½ = • 9 1/6 + 6 ¼ = • 9 – 5 5/6 =

  12. Practice customary systemsPractice sheet 3-6 odds go over

  13. Homework • Practice sheet 3-6 #1-26 evens (for 8-22 show work, simplified, and mixed numbers)

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