Arithmetic Flashcards
Internet
A while number. Negative it positive
Fraction
Integer divided by a non zero integer
Rational number
Number that can be written as a ratio of two numbers
Irrational numbers
Cannot be written as a ratio of two integer (resorting decimals or not perfect squares)
Absolute numbers
Distance from zero
Square root of 2
1.41
Square root of 3
1.73
Square root (a x b)
Square root a * square root b
Odd plus minus odd
Even plus minus even
Even
Odd plus minus even
Odd
Odd x odd
Odd
Even x even
Even x odd
Even
Divisible by 6
If divisbe by 2 and 3
Divisbe by 9
If the sum of it’s digits is divisible by 9
Divisible by 4
Divisible by 4 if the last two digits are divisible by 4 (like 1728)
Divisible by 7
If the difference of it’s units digit times 2 and the digits in the number is divisible by 7 (203 is divisible by 7 since 20-(3*2)=14)
Divisible by 8
If last 3 digits are divisible by 8
A^b * A^c
A^(b+c)
A^b / A^c
A^(b-c)
(A^b)^c
A^(bc)
B^a * C^a
(BC)^a
(Ab) ^ (.5)
(a)^.5. * (b)^.5
(A/B) ^.5
(A)^.5/(B)^.5