6 ­ Fractions.notebook
September 21, 2015
MFM 1PI Unit 1: Grade 8 Review
Last Day: Order of Operations(________)
BEDMAS
Today:
Multiplying and Dividing Fractions
Looking Ahead:
Test bumped to Day 1 Thurs. Oct 1, Day 2 Fri. Oct 2
1
6 ­ Fractions.notebook
September 21, 2015
Fractions Terminology
A proper fraction in which; the numerator is smaller than the denominator. Like An improper fraction is a fraction in which; the numerator is greater than or equal to the denominator. Like
is part whole number and part fraction.
A mixed number is a number that Like . You can change a mixed number to an improper fraction like this:
=
in the series 0, 1, 2, 3, 4,...
A whole number is a number You can change a whole number into a fraction by dividing by 1 (i.e. giving the whole number a denominator of ___).
1 ex. 4=
Multiplying Fractions
and denominators together
• Multiply the numerators together • Reduce the final answer to lowest terms
Examples:
a.
b.
c.
Convert all mixed numbers to__________________ and give all whole improper fractions
numbers a _______________ex. 3=
­5=
denominator of 1
d.
e.
f.
2
6 ­ Fractions.notebook
September 21, 2015
Dividing Fractions
improper fractions
• Convert all mixed numbers to _______________ and give all whole numbers a 1
denominator of ___
1st fraction , change to , • Keep the __________
and___________
invert ("flip") the 2nd fraction
• Multiply the numerators together and denominators together just like before
• Reduce the final answer to lowest terms
Examples
a.
b.
c.
d.
Common Denominators
i. When adding or subtracting fractions, it is essential that we have a common denominator. ii. What if the denominators are different?
We can make a common denominator be creating equivalent fractions!
Remember: when making equivalent fractions, what you do to your denominator, you must do to your numerator!
3
6 ­ Fractions.notebook
September 21, 2015
Skills Quiz
a)
b)
4
6 ­ Fractions.notebook
September 21, 2015
MFM 1PI Unit 1: Grade 8 Review
Last Day: Multiplying and Dividing Fractions
Today:
Adding and Subtracting Fractions
Looking Ahead:
Test bumped to Day 1 Thurs. Oct 1, Day 2 Fri. Oct 2
5
6 ­ Fractions.notebook
September 21, 2015
Adding and subtracting fractions
1. Convert all mixed numbers to________________and give all whole numbers a improper fractions
denominator of ___
1
a common denominator
2. Create____________________ by multiplying numerators and denominators by the same value to make equivalent fractions
3. Add or subtract ___________, and keep the common denominator
numerators
lowest terms
4. Reduce the final answer to ________________.
Examples
a.
b.
c.
d.
e.
f.
g.
6
6 ­ Fractions.notebook
September 21, 2015
Skills Quiz
a)
b)
7