Math

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Author:
pilismok
ID:
238914
Filename:
Math
Updated:
2013-10-05 22:44:33
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  1. Difference
    Minuend - Subtrahend =Dif-ce
  2. Quotient
    Divisor/ Dividend = Quotient
  3. Product
    Factor x Factor = Product
  4. Prime numbers (10)
    2, 3, 5, 7, 11, 13, 17, 19, 23, 29
  5. Divisibility rules
    • Divisible
    • by 2: last digit is 0, 2, 4, 6, 8, 
    • by 3: sum of digits is divisible by 3
    • by 5: 0, 5
    • by 6: divisible by 3 and 2
    • by 9: sum of digits is div-le by 9
    • by 12: sum of digits is div-le by 3 and 4
  6. Squares of first 10:
    • 10^(-1)=0.1
    • 10^(-2)=0.01
    • 5^2=25
    • 6^2=36
    • 7^2=49
    • 8^2=64
    • 9^2=81
    • 10^2=100
  7. Cubes of (10):
    • 2^3=8
    • 3^3=27
    • 4^3=64
    • 5^3=125
    • 6^3=216
    • 7^3=343
    • 8^3=512
    • 9^3=729
  8. Root rules
    • Radical = sq root
    • Radicand = number under sq root
    • sq root (A*B)= sq r(A) * sq r(B)
    • sq root (A/B) = sq root (A) / sq root (B)
  9. real numbers
    rational numbers
    integers
    whole numbers
    natural (counting)
    • real numbers = all
    • rational numbers = fractions
    • integers = -,0,+
    • whole numbers 0,+
    • natural (counting) 1,2,3
  10. GCF, LCM
    • GCF = Greatest common factor, that divides evenly into 2 (or more) numbers:
    • 36 and 54 has following factors: 1, 2, 3, 6, 9, 18.
    • 18 is GCF of 36 and 54

    • LCM = smallest number that two numbers divide evenly
    • Multiples of 5 = 10, 15, 20, 25, 30
    • Multiples of 15 = 30, 45, 60 
    • 30 is LCM of 15 and 5

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