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26 Cards in this Set
- Front
- Back
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Divisibility Rule of 2
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Ones digit is 0,2,4,6,8 (even #'s)
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Divisibility Rule of 3
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The sum of its #'s is divisible by 3
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Divisibility Rule of 4
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Last 2 digits is divisible by 4
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Divisibility Rule of 5
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Ones digit is 0 or 5
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Divisibility Rule of 6
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Ones digit is even AND sum of digits is divisible by 3
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Divisibility Rule of 8
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Last 3 digits is divisible by 8
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Divisibility Rule of 9
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Sum of it's digits is divisible by 9
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Divisibility Rule of 10
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Ones digit is 0
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Compound Interest Formula
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A = P (1+r/n)ⁿᵗ (solve for A)
• A = amount at end • P = principal • r = rate of interest as a decimal • n = number of compoundings per year • t = term in number of years |
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Factoring Cubes
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1. Sum or difference of 2 cubes
2. Binomial • Trinomial 3. Middle term is the opposite of the sum of the 1st factor |
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Cubes
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1, 8, 27, 64, 125, 216
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FOIL Method
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• First terms of each minomial multiplied
• Outside terms multipled • Inside terms multiplied • Last terms multiplied |
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Distributive Laws
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Multiply everything inside of parentheses by what is outside.
a(b-c) = ab - ac |
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Associative Laws
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When ONLY addition or ONLY multiplication are involved, changing the location of the parentheses doesn't change the answer.
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Commutative Laws
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• Addition: For any numbers a & b, a+b=b+a.
• Multiplication: For any numbers a•b, ab=ba The order can be changed without changing the answer. |
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Natural Numbers
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The positive, whole numbers used for counting.
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Composite Number
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A natural number, other than 1, that is not prime.
i.e.: 4 = 1 • 4 or 2 • 2 |
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Quotient
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The answer after you DIVIDE one number by another.
dividend / divisor = quotient |
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Order of Operation
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1. Inside parentheses, brackets or braces.
2. Evaluate all exponential expressions. 3. Multiply and divide left to right. 4. Add and subtract left to right. |
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Divisor
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A number by which another number is to be divided.
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Numerator
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The number above the line in a fraction.
Also, the number divided INTO in a division problem. |
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Prime Numbers
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• A natural number.
• Greater than 1. • Has no positive divisors besides 1 and itself. |
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Product
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The answer when 2 or more numbers are multiplied.
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Factor
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Numbers you can multiply together to get any other number without a remainder.
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Inches in a Yard
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36 (or 3 feet)
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Inches in a Mile
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63,360
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