Test 4 Study Guide- Multiplying Fractions

Test 4 Study Guide- Multiplying Fractions
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Learning Target: I can…Use models to represent parts of numbers and fraction
Model fraction sets
6/7
Model fractions on a number line
5/7
a
3 1/3
b
a=1/7
c
b=3/7
c=6/7
Learning Target: I can…write fractions in simplest form.
Which of these fractions are in simplest form? (Circle)

Write these fractions in simplest terms.
A simplified fraction has the same value as the original
fraction. You must find the greatest common factor of
the numerator and the denominator
Divide both the numerator and the denominator by that
number until the only factor they have in common is 1.
Example
÷
Learning Target:






I can… Estimate products of fractions
Round down to 0
Round to 1/2
Round up to 1
Round to 0, ½ or 1 whole.
If the numerator is a
lot smaller than the
denominator, round
the fraction down to
0.
Ex: ¼ ≈ 0
If the numerator is
about half of the
denominator, round
the fraction to ½.
If the numerator is
almost as large as
the denominator,
round the fraction
to 1.
Ex: 7/8 ≈ 1
5/6 ≈ ____
1/7≈_____
3/9 ≈____
8/9≈_____
Ex: 2/5 ≈ 1/2
2 1/8 ≈____ 4 5/6≈_____
Learning Target:
I can… convert mixed numbers and improper fractions
Mixed to Improper: Multiply denominator by whole
number and add numerator.
Convert from mixed numbers to improper and
improper to mixed numbers.
6 
5 
Improper to Mixed: Divide numerator by
denominator. Remainder is your fraction.
6 
5 




Learning Target: I can…Multiply fractions by a fraction
Multiply mixed numbers and whole numbers
Multiply fractions in real world situations
·
n x n
d
d
Remember: To multiply fractions, you must have
Fraction and fraction
Fraction and Whole Number
ANSWERS IN SIMPLEST
Mixed Number and Mixed Number
3 x 4 
x 4
FORM!!
Real World
Problems
“of” = X
2
1
 x 
 1
ALWAYS EXPRESS YOUR

x 3  x 15 
2
3
Jan sold ¾ of her
12 eggs. How
many eggs did
she sell?
¾ x 12=9
TRY THESE ON YOUR OWN!!!
x 
x 8
5 x 2 
Carl ran ½ of a 9
mile marathon.
How many
miles did he
run?
½X9=4½