Chapter 10 Lesson 4 Converting units of measurement

Chapter 10 Lesson 4 Converting units of measurement and Adding & subtracting units of measurement

Converting Trick Changing from a smaller unit to a larger unit: Divide S L 2 feet Example: 24 inches= ___ ÷ 12 You know the inches; so you are going from the inches to the feet {inches are smaller than feet} Smaller to larger Remember! 12 in. = 1 foot

Practice Converting S 3 feet 36 inches= ___ ÷ 12 5 ___ feet = 60 inches ÷ 12 L What will you do? ÷ 12

Practice Converting S 4 feet 48 inches= ___ ÷ 12 8 ___ feet = 96 inches ÷ 12 L What will you do? ÷ 12

Practice Converting S 1 yard 3 feet = ___ ÷ 3 4 ___ yards = 12 feet ÷ 3 L What will you do? ÷ 3

Practice Converting S 1 mile 5, 280 feet= ___ ÷ 5, 280 L ÷ 5, 280 3 miles = 15, 840 feet ___ ÷ 5, 280 What will you do? ÷ 5, 280

Practice Converting S 1 mile 1, 760 yards= ___ ÷ 1, 760 L What will you do? ÷ 1, 760 5 miles = 8, 800 yards What will you ___ ÷ 1, 760 do? ÷ 1, 760

Practice Converting 48 inches= 4 feet ___ X 12 7 feet = 84 ___ inches x 12 Lx. S What will you do? X 12 What will you do? x 12

Practice Converting 18 feet = 6 yards ___ X 3 21 feet 7 yards= ___ x 3 Lx. S What will you do? X 3 What will you do? x 3

Regroup 1 foot =12 inches 4 18 5 ft 66 in - 2 ft 9 in • 6 can’t subtract 9: regroup • Take 1 from 5 feet • The 1 foot becomes 12 inches • Add 12 inches to 6 in. =18 in. • Subtract as usual