C2 Positive and Negative Numbers Flashcards Preview

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Flashcards in C2 Positive and Negative Numbers Deck (10)
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1
Q

additive inverse numbers

A

are numbers that are the opposite in sign but otherwise the same number

a + (-a) = 0

2
Q

binary operations

A

involves two numbers, you need two numbers to perform the operation

the big four operations are all binary

3 +

3
Q

non-binary operations

A

they need just one number to perform the operation

square roots

absolute value

4
Q

factorial operation

A

to find the value of n!, you multiply that number by every positive integer smaller than n.

3! = 3 x 2 x 1 = 6

4! = 4 x 3 x 2 x 1 = 24

5
Q

greatest integer function

A

takes any real number that isn’t an integer and changes it to the greatest integer it exceeds. If the number is already an integer it stays the same.

[n] = the biggest integer not greater than n, if n is not an integer, or

n, if n is an integer

4 1/2 = 4

-3.87 = -4

8 = 8

6
Q

when adding numbers with different signs, forget the signs and find the difference between their _____ _____, the number farthest from ____ determines your sign

A

when adding numbers with different signs, forget the signs and find the difference between their absolute values, the number farthest from zero determines your sign

7
Q

rule for subtracting signed numbers

A

change the minus sign to a plus sign and change the number that the minus sign was in front of to its opposite sign

  • 16 - 4 = -16 + (-4) = -20
  • 3 - (-5) = -3 + (+5) = 2

9 - (-7) = 9 + (+7) = 16

8
Q

commutative property

A

Addition and Multiplication are commutative, meaning you can change the order of the numbers in the operation without affecting the result

4 + 5 = 9

5 + 4 = 9

9
Q

associative property

A

Addition and multiplication are associative, meaning that even if the grouping of the operation (more than two numbers) changes the results remain the same.

4 + (5 + 8) = 4 + 13 = 17 and (4 + 5) + 8 = 9 + 8 = 17

10
Q

factorial operation is used a lot in

A

statistics and higher mathematics