Transcript Changing Units in the Customary System

Changing Units in
the Customary
System
Lesson 3-6
Brainpop Quiz
Customary Units
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1. C
2. A
3. D
4. B
5. B
6. D
7. D
8. A
9. C
10.C
Answers
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
(LargeSmall or SmallLarge)
• Multiply or Divide by the appropriate
conversion unit.
– LS then multiply
– SL then divide
Example
48
12 gal = ______
qt
LS
12 x 4
MULTIPLY
(1 gal = 4 qt)
Example 2
40 in = ______ ft
SL
40 ÷ 12
1
1
10 40 x 1
1
12 3
10
3
=
3
We can divide fractions so
that remainders can be
described as fractions.
1
3
10 2/3 yd
10 yd 2ft = ______
Small to Large (ft to yd)
Divide
Keeps yards the same
2/3
Computing With Units
• Combine or subtract like units.
• Regroup.
19
7 8 feet 7 inches
-
5 feet 11 inches
2 feet 8 inches
1 foot = 12 inches
Homework Time
Pg. 150
#2-28 even
10-28 write if you’re going
S->L or L->S, and if multiply
or divide
Bellringer
MUST SHOW YOUR WORK!!!!!
1)6 ½ ÷ 1 ½ =
2)3 2/3 X 1 ½ =
3)9 1/6 + 6 ¼ =
4)9 – 5 5/6 =
Practice customary systems
Practice sheet 3-6 odds go over
Homework
• Practice sheet 3-6
#1-26 evens (for 8-22 show work,
simplified, and mixed numbers)