Changing Units in the Customary System

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

1. C
2. A
3. D
4. B
5. B
6. D
7. D
8. A
9. C
10. C

4
(No Transcript)
5
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)
6
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

7
Example
48
12 gal ______ qt
L ? S MULTIPLY
x
12
4
(1 gal 4 qt)
8
Example 2
40 in ______ ft
S ? L

40
12
We can divide fractions so that remainders can be
described as fractions.
1
1
10
x
40
1
1
12
3
10
3
1

3
3
9
10 yd 2ft ______ yd
10 2/3
Small to Large (ft to yd) Divide
Keeps yards the same 2 / 3
10
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
11
Homework TimePg. 150 2-28 even10-28 write
if youre going S-gtL or L-gtS, and if multiply or
divide
12
(No Transcript)
13
(No Transcript)
14
Bellringer

• MUST SHOW YOUR WORK!!!!!
• 6 ½ 1 ½
• 3 2/3 X 1 ½
• 9 1/6 6 ¼
• 9 5 5/6

15
Practice customary systemsPractice sheet 3-6
odds go over
16
Homework

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