Lesson 3.7 Concept: Convert units of measure Guidelines: Multiply by the conversion factor when converting from a larger measure to a smaller measure. Divide by the conversion factor when converting from a smaller measure to a larger measure. Time Hours to minutes (•60) Minutes to seconds (•60) Weeks to days (• 7) Years to days (•365) Years to weeks ( • 52) Minutes to hours (÷ 60) Seconds to minutes (÷ 60) Days to weeks (÷ 7) Days to years (÷ 365) Weeks to years (÷ 52)

14 • 60 = 840 min. 12 hours Time Hours to minutes (•60) Minutes to seconds (•60) Weeks to days (• 7) Years to days (•365) Years to weeks ( • 52) Minutes to hours (÷ 60) Seconds to minutes (÷ 60) Days to weeks (÷ 7) Days to years (÷ 365) Weeks to years (÷ 52) Practice: 14 hours to minutes 720 minutes to hours 1 2 14 • 60 = 840 min. 60 ) 720 12 hours 60 120 120

Metrics Conversions milli centi meter kilo liter gram Multiply by the conversion factor when converting from a larger measure to a smaller measure. Divide by the conversion factor when converting from a smaller measure to a larger measure 0.001 0 .1 1 1000 3 kiloliter to liters 5 140 milligrams to grams 200 600 = 600 liters 1 140 ÷ 1000 = 0.14 grams 3 • 1000 = 5 1 or 140 • 0.001 = 0.14 grams 1

Kilo Hecto Deka Meter Deci Centi Milli Liter Gram Base Unit Kilo Hecto Deka Meter Deci Centi Milli Liter Gram 1000 100 10 1 0.1 0.01 0.001 * Bigger to smaller move the decimal to the right (multiply) * Smaller to bigger move the decimal to the left (divide)