7th math -c2--L9--sept7
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7th math -c2--L9--sept7 Presentation Transcript

  • 1. lesson 9.notebook September 07, 2012 Assignment: 1­­>Set 10 (evens) ­ Due Tuesday (9/11) 2­­>Test #1 ­ Tuesday (9/11) 1
  • 2. lesson 9.notebook September 07, 2012 Lesson 9 Warm­Up: 1) Write 26,500 in expanded notation. 2) List all of the factors of 18. 3) List all of the factors of 24. 4) What is the GCF of 18 and 24? 5) A dime is what fraction of a dollar? 2
  • 3. lesson 9.notebook September 07, 2012 Lesson 9: *FYI... to add or subtract fractions, we must write them with common  denominators *AND... To multiply fractions­­multiply the tops, then the bottoms­­then  simplify! *ALSO... The product of a number and its reciprocal is one 3
  • 4. lesson 9.notebook September 07, 2012 Examples (Lesson 9): Simplify. A)  5/6  +  1/6 B)  4/5  ­  3/5 C)  3/5  x  1/2  x  3/4 4
  • 5. lesson 9.notebook September 07, 2012 D)  3/3  +  3/3  +  2/3 E)  4/7  x  2/3 F)  5/8  ­  5/8 5
  • 6. lesson 9.notebook September 07, 2012 G)  14  2/7%  +  14  2/7% H) 87  1/2%  ­  12  1/2% Write the reciprocal of the following: I)  4/5 J)  8/7 K)  5 6
  • 7. lesson 9.notebook September 07, 2012 Find the missing number. L)  5/8  a  =  1 M)  6m  =  1 7
  • 8. lesson 9.notebook September 07, 2012 O)  How many 2/3s are in 1? P)  If a/b  = 4, what does b/a =? Q)  What property of multiplication is illustrated by this equation?   2/3  x  3/2  =  1 8