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Difference
Minuend - Subtrahend =Dif-ce
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Quotient
Divisor/ Dividend = Quotient
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Product
Factor x Factor = Product
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Prime numbers (10)
2, 3, 5, 7, 11, 13, 17, 19, 23, 29
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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
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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
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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
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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)
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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
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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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