FRACTIONS
A Great Big Piece of Fun
FRACTIONS
• Fractions were invented to express
numbers that are in between whole
numbers.
• Fractions can show measures
between whole numbers on rulers
or scales.
FRACTIONS
• Fractions can name part of a whole
object or part of a collection of
objects.
whole
collection
FRACTIONS
• Fractions can express chance or
probability - 1 out of 3 chance (1/3)
• Fractions can represent division
¾ = 3÷4 = .75
• Most fractions are fractions of
“something” referred to as the
whole, one, or unit.
FRACTIONS
• The number on the bottom of the
fraction is called the denominator.
• The denominator tells you how
many parts the whole is divided
into.
5/9 = 5 out of 9 total pieces
(a little more than half)
FRACTIONS
• The numerator is the number on
the top part of the fraction.
• The numerator names the number
of parts under consideration.
½ = 1 out of 2 parts
FRACTIONS
• For this activity, you will need a
partner.
• Each pair will need 20 counters and
page 122.
• We will be working together as a
class. Please do not work ahead.
FRACTIONS
• On this sheet, there are three types
of problems:
•
Whole and part are given and the solution
requires you to name the fraction.
8 puppies and 3 of them are girls. What
fraction of the puppies are girls?
Complete problems 1 and 2
FRACTIONS
•
Whole is given and the fraction is named.
The solution requires you to name the
part.
If Joe has 21 coins, how many coins would be
in 1/7 of his collection?
Complete problems 3, 4, and 7
FRACTIONS
•
The part is given and the fraction is
named. The solution asks for the value of
the whole.
If $5.00 is 1/5 of the ticket price, what is the
total cost of the ticket price?
Complete problems 5, 6, and 8
FRACTIONS
• How can a ruler teach us about
fractions?
Each inch on a ruler is broken into
equal pieces. The inch would be the
unit or whole. The hash marks
between each inch would be the
fractions of the inch.
}
One Inch
}
One Half Inch
Each inch is broken into 8
equal pieces or eighths (1/8)
If each inch is broken down into eights,
how many eighths in one-half an inch?
If each inch is broken down into eights,
how many eighths in one-quarter an inch?
1 inch = 8/8
½ inch =4/8
¼ inch = 2/8
Look at your ruler. What fractional part is
each inch broken into?
How many different names can
½ have on your ruler?
LET’S PLAY A
GAME CALLED
MASTERMIND