Download AN Inv 3.3 Div of Rational Num Day 1

Math CC7/8 – Be Prepared
On Desk:
Learning Log:
1. Pencil
1. HW: p. 68, #14, 15,
2. *Math
#19-24 (directions!), #25
Journal
2. AN Quiz – Friday 10/14
3. Learning Log
*Get ready for a Warm Up in your journal!
Turn in: SD Test with Signature!!
Tasks for Today
• Warm Up
• Lesson 3.3 – Division of Rational
Numbers – Day 1
• Begin HW?
Warm Up
Copy and solve the following problems
in your journal…
1)
2)
3)
4)
5)
6)
-0.9 ÷ 1.44 =-0.625
7 (-6) = -42
-4 (-9) = 36
3.4 (-0.2) = -0.68
-3/4 (-1/3) = 1/4
-1 ½ (5) = -7 1/2
2 (-0.25) = -0.5
Multiplying Integers - Rules
Positive x Positive = Positive
Positive x Negative = Negative
Negative x Positive = Negative
Negative x Negative = Positive
p. 60
Skip A & B
• Divide the absolute values of the two
numbers (ignore the signs), then decide
which sign to use.
• If the signs are the same, the quotient
will be positive.
• If the signs are different the quotient
will be negative.
Dividing Integers - Rules
Positive ÷ Positive = Positive
Positive ÷ Negative = Negative
Negative ÷ Positive = Negative
Negative ÷ Negative = Positive
No! Division in NOT commutative.
When you change the order, you get
quotients that are multiplicative inverses
of one another!
Adding zero to ANY rational number does NOT
change the value of the number.
Yes! The multiplicative identity is 1.
The sum of a number and
its opposite (additive
inverse) is always zero!
Zero is its own
additive inverse.
Each nonzero rational number has
a multiplicative inverse.
It is the reciprocal of the number.
A number times its multiplicative
inverse is equal to one!
Begin G?