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