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# 101 Properties of real numbers Part 2

## on Oct 25, 2009

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Properties of real numbers lesson

Properties of real numbers lesson

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## 101 Properties of real numbers Part 2Presentation Transcript

• Properties of Real Numbers Part 2 Rules that real numbers follow
• Essential Question
• What rules do real numbers follow?
• Equality
• Equality
• If a=b, then
• a+c=b+c
• Equality
• Subtraction
• If a=b, then
• a-c=b-c
• Equality
• Multiplication
• If a=b, then
• ac=bc
• Equality
• Division
• If a=b, then
• a/c=b/c
• Substitution
• If a = b, then a may be substituted for b.
• Reflexive
• A number equals itself
• a = a
• 3 = 3
• Symmetric
• If two things are equal, then the equation can be flipped.
• Symmetric
• If a = b, then b = a
• 2x + 9 = 23 is the same as 23 = 2x + 9
• Transitive
• If a = b & b = c, then a = c
• 4 = x & x = z, then . . .
• z = 4
• Essential Question:
• What rules do real numbers follow?