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Do Now

Do Now. Leave your notebooks and writing utensils away, take out ONLY your calculators. Use your calculator to simplify: (3.5 x 10 4 )(5.7 x 10 6 ) 1.995 x 10 10 b) 1.995 x 10 11 c) 1.995 x 10 – 10 d) 19,950,000,000. Midterms.

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Do Now

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  1. Do Now Leave your notebooks and writing utensils away, take out ONLY your calculators. Use your calculator to simplify: (3.5 x 104)(5.7 x 106) • 1.995 x 1010 b) 1.995 x 1011 c) 1.995 x 10– 10 d) 19,950,000,000

  2. Midterms • While some of you did very well, many of your midterm grades could have been better. • Quite a few of you did not hand in the take home quiz or the review labs. • Quite a few of you were not as focused as you could have been during the review. • Keep this in mind: YOU HAVE TO PASS THE REGENTS IN JUNE TO GRADUATE!!!! • If you fail math this year, you have to repeat it again next year. • Let’s start the new semester on a better note!!

  3. Let’s Look at Your Tests You can only have your calculators out. KEEP ALL NOTEBOOKS AND WRITING UTENSILS AWAY!!! * We’re only going to look at your tests quickly. If you would like to look at your test more, come see me and we can go over it one day after school.

  4. Factors When two numbers are multiplied, each number is called a factor of the product. List the factors of 18: 18: 1, 2, 3, 6, 9, 18 * Calculators: Y = (your number) / x

  5. Prime and Composite Numbers Prime Number – a whole number greater than 1, that’s only factors are 1 and itself. ex. 2, 3, 5, 7, 11, 13, 17, 19 Composite Number – a whole number greater than 1, that has more than two factors. ex. 4, 6, 8, 9, 10, 12, 14, 15, 16, 18

  6. Factor each number. Then classify it as primeor composite. a. 17 b. 25 Answer: 1, 17; prime Answer: 1, 5, 25; composite

  7. Greatest Common Factor Greatest Common Factor (GCF) – the greatest number or monomial that is a factor of ALL of the original terms. Steps: • Factor the smallest coefficient. • The GCF is the largest factor that goes into ALL of the other coefficients. • For each variable that ALLof the terms have, the GCF is always the smallest exponent.

  8. Finding the GCF Find the GCF of each set of monomials. • 48, 60 2) x3, x5 3) z4, z2

  9. 12a5, 18a2 • 18xy, 36y2 • 36x2y, 54 xy2z • 12a5c7, 24a3b2c, 18a10b4c3

  10. Homework Chapter 9 Packet Pgs. 524 multiples of 3 (right column)

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