# Math Flashcards

1
Q

>

A

Greater than

2
Q

<

A

Less than

3
Q

=

A

Equal to

4
Q

A

Two or more numbers you add together

5
Q

Sum

A

6
Q

Minuend

A

Number you subtract from in a subtraction problem

7
Q

Subtrahend

A

Number you subtract in a subtraction problem

8
Q

Difference

A

9
Q

Factor

A

Number multiplied by another

10
Q

Product

A

11
Q

Divisor

A

Number that get divided from another number

12
Q

Dividend

A

Number that divides into another number

13
Q

Quotient

A

14
Q

Rational number

A

Numbers that can be expressed as fractions

15
Q

Whole numbers

A

Any positive, non-fraction or non-decimal number

16
Q

Prime numbers

A

Numbers that can be divided into itself only

17
Q

Exponent

A

Rule to multiply that number by the exponent

18
Q

Integer

A

Positive or negative whole number or zero

19
Q

Real number

A

any known number on the number line

20
Q

Rational numbers

A

Numbers that can be expressed as fractions

21
Q

Numerator

A

Top number of a fraction

22
Q

Denominator

A

Bottom number of a fraction

23
Q

Proper fraction

A

Fraction where numerator is smaller than denominator

24
Q

Improper fraction

A

opposite of proper fraction

25
Q

Mixed number

A

Whole number and a fraction

Another method of writing an improper fraction

26
Q

Greatest Common Factor (GCF)

A

Largest number that divides evenly into two or more numbers

27
Q

Least common multiple

A

Smallest number that two or more numbers divide into evenly

28
Q

Relatively prime

A

Term to describe two or more numbers whose GCF is 1

29
Q

Lowest terms

A

Fraction A/B, where A & B are relatively prime

30
Q

Reciprocal

A

Resulting fraction when you switch the numerator and the denominator, the reciprocal of A/B is B/A

31
Q

Variable

A

Letter that takes place of a number

32
Q

Algebraic expression

A

Collection of numbers and variables connected by signs and symbols

33
Q

Term

A

Individual piece of an expression

34
Q

Like terms

A

Terms with the same variables and same exponents

35
Q

Equation

A

Two equal expression

36
Q

A

1/4 + 1/6 = 3/12 + 2/12 = 5/12

37
Q

Subtracting fractions

A

Find LCD, Subtract numerators, Simplify

3 - 5 1/3 = 9/3 - 16/3 = 7/3 = 2 1/3

38
Q

Multiplying fractions

A

Multiply across, then simplify

39
Q

Division of fractions

A

Make second number a reciprocal and multiply

3/4 / 7 = 3/4 / 7/1 = 3/4 x 1/7 = 3/28

40
Q

Calculation of percent

A

15% of 500 is what number?
0.15 x 500 = 75

What percent of 250 is 10?
0.04

41
Q

Convert fractions to a decimal

A
```3/125 = 125/3.000 = 0.024
1/6 = 6/1.000000 = 0.1666666666```
42
Q

Estimation

A

Approximate value of the solution to a problem

43
Q

Take-home pay

A

Add all deductions together, then subtract that total from the beginning salary

44
Q

Roman numeral system

A

System of writing numbers using a combination of M, D, C, L, X, V, I

45
Q

Roman numeral: L

A

50

46
Q

Roman numeral: C

A

100

47
Q

Roman numeral: D

A

500

48
Q

Roman numeral: M

A

1,000

49
Q

Changing roman numerals to Arabic numbers

A
1. From left to right, write as sum
2. Begin with largest possible value: M, D, C, L, X, V, I
3. When I, X, C is used to the left of a larger value, subtract its value from the larger value
```Example:
MCCXXXIV
M = 1000
CC = 100+100
XXX = 10+10+10
IV = 5-1
= 1234```
50
Q

Changing Arabic numbers to roman numerals

A
1. Write from left to right.
2. Take each place value and change to a Roman numeral.
3. I, X, and C may be written two or three times in a row as long as they are not followed by a larger value.
4. Use I, X, and C to the left of larger values to indicate subtraction from the larger values.
5. V, L, and D are never used to the left of a larger value.
6. V, L, and D are never used more than one time.
```ex. Al Khwarizmi wrothe the first book of algebra in 825 C.E. Write this date in Roman numerals.
800=500+100+100, so DCCC
20=10+10, so XX
5=5, so V
DCCC+XX+V=DCCCXXV```
51
Q

3x/5 - 2 = x + 1/3

A

-35/6;

3x/5 - 2 = x + 1/3 find LCD = 15;

9x/15 - 30/15 = 15x/15 + 5/15 place the x’s on one side of the equation & the constants on the other;

• 35/15 = 6x/15;
• 35 - 6x or x = -35/6
52
Q

298.52 / 6.8 =

A

43.9

53
Q

2 1/2 x 1 1/2 = 5/2 x 3/2 = 15/4 =

A

3 3/4;

2 1/2 x 1 1/2 = 5/2 x 3/2 = 15/4 = 3 3/4

54
Q

8 5/8 - 7 11/16 =

A

15/16;

8 5/8 - 7 11/16 = 8 10/16 - 7 11/16 = 138/16 - 123/16 = 15/16

55
Q

Fractional Equivalent

6 2/3 =

A

1/15;

6 2/3 = 20/3 / 1/100 = 20/300 = (simplify) 1/15

56
Q

Bar graph displays what?

A

Frequency and compares discreet data

57
Q

Simplify;

5/6 / 9

A

5/54

5/6 / 9 = 5/6 x (reciprocal) 1/9 = 5/54

58
Q

Simplify:

3 2/4 x 1 1/2 =

A

5 1/4

14/4 x 3/2 = 42/8
5 2/8 = 5 1/4

59
Q

Simplify:

0.4 / 0.5 =

A
1. 8

0. 4 / 0.5 = 4 / 5 = 0.8

60
Q

Multiplying Decimals:

5.62 x 0.3

A

1.686

5.62 x 0.3;
562 x 3 = 1686;
There are three decimal points = 1.686

61
Q

Compute the difference

3 - 5 1/3

A

-2 1/3;

3/1 = 9/3;
5 1/3 = 16/3;
9/3 - 16/3 = -7/3;
-7/3 = -2 1/3

62
Q

Simplify:

3/15 - 2/25

A

3/25;

3/15 x 5 = 15/75;
2/25 x 3 = 6/75;
15/75 - 6/75 = 9/75 = 3/25