Pre-Algebra Pd. 3 Date: 1/14/2009
May 21, 2015
Pre-AlgebraPd. 3
Date: 1/14/2009
Conversions
Objective: To convert linear measurements
within the same system
To change units:Multiply when going from
larger units to smaller units.
5 lb = ___ oz5 ∙ 16 = 80 oz
Multiply
Divide when going from smaller units to larger
units.28 fl oz = __ c28 ÷ 8 = 3 ½ c
Divide
Ex. 1:How many hours are in 31 days?
31 days = ___ h(larger to smaller)
MULTIPLY
31 ∙ 24
= 744 hrs
Ex. 2:How many minutes are there in 840 seconds?
840 sec = ____ min (Smaller to larger)
DIVIDE
840 ÷ 60
= 14 min
C/W #1: How many days are there
in 3 years?3 y = ____ d 3 ∙ 365 = 1095 days
C/W #2: How many seconds are
there in 15 minutes? 15 min = ___ sec15 ∙ 60 = 900 sec
C/W: Practice WS #13-18
Let’s work with Length . . .
Ex. 3: 96 in = ___ ft
(small to large)DIVIDE96 ÷ 12
= 8ft
Ex 4.: 3 mi = ___ ft
(large to small)MULTIPLY
3 ∙ 5280 = 15,840ft
3 mi = ___ inRefer to PSSA Formula
SheetCalculate how many
inches in one mile.______in = 1 mi63,360
3 mi = ________ in
3 ∙ 63,360 = 190,080 in
190,080
C/W: Practice WS #1 - 6
Customary Measures
Let’s see if “The Gallon The Gallon ManMan” can help!
or Refer to PSSA Formula Sheet
GQQQQ
PP
PP
PP
PP
C/W: Convert the following:1. 8 gal = ___ qt2. 96 oz = ___ lb3. 30 lb = ___ oz4. 26T = ___ lb5. 96 qt = ___ gal
H/W: Customary Conversions WS
& finish Practice WS