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Materials
Reminders
Get out your agenda if you see
your name below. You must
finish your test during FLEX
period tomorrow
Period 2
Period 7
Felix Garcia
Kayla Whitney
Haley Moore
Page 101; 58-60
2-3 Multiplying Positive
and Negative Fractions
How do I multiply
positive and negative
fractions?
Work
Area:
Reminder. When using Cornell Notes, the notes on the right
hand page are facts. The left hand page (which is blank) is for
your thoughts, ideas, practice, etc.
Activity
1. Divide into groups of 2
2. Discuss with your partner how you would:
1. Shade in an area that represents
2. Shade in an area that represents
3
5
4
5
5
5
3. Shade in an area that represents
3. Be prepared to share your thoughts with the class
Work
Area:
Activity Continued
1. Divide into groups of 2
2. Discuss with your partner how you would:
1. Shade in the area that represents
2. Shade in the area that represents
3. Shade in the area that represents
1
3
2
3
3
3
4. Be ready to explain how you solved one of these equations
with the class.
Work
Area:
Activity Continued
1. Divide into groups of 2
2. Discuss with your partner how you would:
1. Shade in the area that represents
1
3
2
3
3
3
of
2. Shade in the area that represents of
3. Shade in the area that represents of
3
5
4
5
5
5
4. Be ready to explain how you solved one of these equations
with the class.
Questions:
How do I
multiply
positive
fractions?
Notes:
Step 1: Write in simplest form
3 2
× =
7 9
×
Step 2: Multiply the numerators
1 2 2
× =
7 3
Step 2: Multiply the denominators
1 2
2
× =
7 3 21
Step 3: Simplify if possible
2
2
=
21 21
Questions:
How do I
multiply
negative
fractions?
What are the 3
types of
fractions
Notes:
Multiply negative fractions in the same way that you multiply
positive fractions.
REMINDER – If the fractions have the SAME SIGN the answer
will be positive. If the fractions have DIFFERENT SIGNS, the
answer will be NEGATIVE.
𝟒
5
𝟒
6
57
Mixed
Fraction
How do I
change a mixed
number into an
improper
fraction?
3
4
Proper
Fraction
15
6
Improper
Fraction
Multiply the denominator and the whole number
together, and then add on the numerator. Place the
resulting number over the original denominator.
7 39
4 =
8
8
Questions:
What is
dimensional
analysis?
Notes:
Dimensional Analysis – The process of including units of
measurement when you compute
ALWAYS INCLUDE UNITS IN YOUR CALCULATIONS IF
POSSIBLE!!
WHY? BECAUSE IT HELPS YOU MAKE SURE YOUR
ANSWER MAKES SENSE!
Bubba walked 4 miles per hour for 6 hours to get a shrimp
sandwich. How far did Bubba walk?
Not using Dimensional Analysis
4 × 6 = 24
USING Dimensional Analysis
4 𝑚𝑖𝑙𝑒𝑠
× 6 ℎ𝑜𝑢𝑟𝑠 = 24 𝑚𝑖𝑙𝑒𝑠
1 ℎ𝑜𝑢𝑟
Reminder: you can cancel units just like numbers!
Work
Area:
Reminder. When using Cornell Notes, the notes on the right
hand page are facts. The left hand page (which is blank) is for
your thoughts, ideas, practice, etc.
Quick Write
1. Of the 3 types of fractions, explain which type you
would prefer to multiply you money by
2. Share your answer in groups of 2
3. Prepare to share with the class
Homework
Page 99-101; 12-40
(even) AND Cornell
Notes Summary