SAT notes sat1数学.pdf

SAT Math Notes 2 + 2 = 4 (even number) All Factor Trees give the same a) 75 b) 50 c) 30 d) 25 e) 5 prime factors, but NOT all Only 25 and 5 are factors of SAME IDEA, but not same factors. By Steve Baba, Ph.D. results for multiplication: 75 and 100, and 25 is larger.  2008. FREE for individual 3 • 2 = 6 (even number) 100 can also be factored as: or classroom use. Not free for Between vs. Including 3 • 1 = 3 (odd number) 10 • 10 commercial or online use. And other tricking wordings 2 • 2 = 4 (even number) 2 • 5 • 2 • 5 of between or including For SAT reading see my site: giving the same prime factors (inclusive, counting the first..) SAT often combines several of as above, but missed the www.FreeV the above rules: nonprime factors 25 and 50. Integers BETWEEN –2 and + for a free list of 5000 SAT words with brief definitions. (odd+odd+even) • odd Both trees missed 4 and 20. 2 (-1,0 , 1) is not the same as Use any even and any odd integers -2 and 2 Integers number to determine