Lesson 1-4 (13:36)
IDENTITY & EQUALITY PROPERTIES
2. Multiplicative Identity
1. Additive Identity
What can you add to a number that
doesn't change its identity?
What can you multiply a number by that
doesn't change its identity?
Numerically:
Numerically:
Algebraically:
Algebraically:
3 . Multiplicative Property of Zero
What happens when you
multiply a number by zero?
4 . Multiplicative Inver se
· Invert a number
2
3
reciprocal
5
Numerically:
Algebraically:
Algebraically:
6. Symmetr ic
5. Refle xive
Line of symmetry:
Algebraically:
1
8
· What happens when you multiply reciprocals?
Numerically:
Numerically:
1
Numerically:
Algebraically:
Lesson 1-4 (13:36)
IDENTITY & EQUALITY PROPERTIES
8 . Substitution
7 . Transitive
Travel
Numerically:
Numerically:
2
Algebraically:
Algebraically:
If x = y, then x may be substituted
for y in any expression.
Evaluate the expression.
Name the property that justifies each step.
Multiplicative Inverse
Multiplicative Property of Zero
Additive Identity
Multiplicative Identity