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LESSON 12 
OB J : S T U D E N T S WI L L U S E T H E P ROP E R T I E S OF R E A L 
N UMB E R S TO S IMP L I F Y E X P R E S S I ON S .
NOTES 
• Inverse = the opposite ex. Inverse of 7 is -7 
• Property of 0 for multiplication a x 0 = 0 
• Identity property of multiplication (IPM) a x 1 = a 
• Identity property of addition (IPA) a + 0 = a 
• Commutative property of multiplication (CPM) ab=ba 
• Commutative property of addition (CPA) a+b = b+a 
• Associative property of multiplication (APM) (a x b)x c = a x(b x c) 
• Associative property of addition (APA) (a + b)+c = a+(b + c)
IDENTITY PROPERTY 
(IPM) 5 x 1 = 5 
100 x 1 = 100 
m x 1 = m 
(IPA) 10 + 0 = 10 
6457 + 0 = 6457 
y + 0 = y
COMMUTATIVE PROPERTY 
• (CPM) 5x7 = 7x5 
400 x 20 = 20 x 400 
xy = yx 
• (CPA) 3+4 = 4+3 
756 + 2 = 2 + 756 
r + z = z + r
ASSOCIATIVE PROPERTY 
• (APM) (5 x 3) x 7 = 5 x (3 x 7) 
24 x (12 x 10) = (24 x 12) x 10 
(w x g) x v = w x (g x v) 
• (APA) (5 + 3) + 7 = 5 +(3 + 7) 
24 + (12 + 10) = (24 + 12) + 10 
(w + g) + v = w + (g + v)
Alg lesson 12

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Alg lesson 12

  • 1. LESSON 12 OB J : S T U D E N T S WI L L U S E T H E P ROP E R T I E S OF R E A L N UMB E R S TO S IMP L I F Y E X P R E S S I ON S .
  • 2. NOTES • Inverse = the opposite ex. Inverse of 7 is -7 • Property of 0 for multiplication a x 0 = 0 • Identity property of multiplication (IPM) a x 1 = a • Identity property of addition (IPA) a + 0 = a • Commutative property of multiplication (CPM) ab=ba • Commutative property of addition (CPA) a+b = b+a • Associative property of multiplication (APM) (a x b)x c = a x(b x c) • Associative property of addition (APA) (a + b)+c = a+(b + c)
  • 3. IDENTITY PROPERTY (IPM) 5 x 1 = 5 100 x 1 = 100 m x 1 = m (IPA) 10 + 0 = 10 6457 + 0 = 6457 y + 0 = y
  • 4. COMMUTATIVE PROPERTY • (CPM) 5x7 = 7x5 400 x 20 = 20 x 400 xy = yx • (CPA) 3+4 = 4+3 756 + 2 = 2 + 756 r + z = z + r
  • 5. ASSOCIATIVE PROPERTY • (APM) (5 x 3) x 7 = 5 x (3 x 7) 24 x (12 x 10) = (24 x 12) x 10 (w x g) x v = w x (g x v) • (APA) (5 + 3) + 7 = 5 +(3 + 7) 24 + (12 + 10) = (24 + 12) + 10 (w + g) + v = w + (g + v)