1. Positive x Positive = Positive Positive x Negative = Negative
Investigation 3: Multiplying and Dividing Rational Numbers
ATN 3.3 Division of Rational Numbers
Learning Target: I will divide rational numbers, including fractions
Homework: Day 3 ATN 3.3 p AND CORRECT in red pen with the KEY.
Warm-up: Write the rules for Multiplying Integers:
Positive x Positive = Positive
Positive x Negative = Negative
Negative x Positive = Negative
Negative x Negative = Positive

4. As a table group, LOOK FOR PATTERNS as you complete p
As a table group, LOOK FOR PATTERNS as you complete p. 9 of your packet:
Two Negative Factors
One Negative Factor
Positive Factors

5. Dividing Integers - Rules
Based on your conclusion above, what is the rule of division for each set of signs?
Dividing Integers - Rules
Positive ÷ Positive = Positive
Positive ÷ Negative = Negative
Negative ÷ Positive = Negative
Negative ÷ Negative = Positive

6. No! Division in NOT commutative.
p. 10
No! Division in NOT commutative.
When you change the order, you get quotients that are multiplicative inverses of one another!

7. a + 0 = a 1 a x 1 = a What is the Additive Identity?
What is the Multiplicative Identity?
What is the definition of Additive Inverse?
What is the definition of Multiplicative Inverse?
a + 0 = a 1
a x 1 = a
The sum of a number and its opposite is always zero
The reciprocal of the number.
A number times its multiplicative inverse is one

9. Practice your division skills
For each number sentence, find a value for n that makes the sentence true.
25 ÷ 5 = n
-25 ÷ (-5) = n
30 ÷ n = -10
10 ÷ -2.5 = n
n ÷ (-4) = (-4)
(-15) ÷ = n
n = 5
n = 5
n = -3
n = -4
n = 16
n = -45

10. ATN 3.3 Division of Rational Numbers
Investigation 3: Multiplying and Dividing Rational Numbers
ATN 3.3 Division of Rational Numbers
Did I reach my Learning Target? I will divide rational numbers, including fractions
Homework: Day 3 ATN 3.3p AND CORRECT in red pen with the KEY.