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Math > Pre-Algebra > Flashcards

Pre-Algebra Flashcards

1
Q

What is an interger?

A

-1 to negative infinity (whole numbers only)

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2
Q

What is the horizontal axis on a coordinated place called?

A

x axis

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3
Q

What is the vertical axis on a coordinated place called?

A

y- axis

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4
Q

When plotting a point on the coordinated plane where does the x and y go in an ordered pair? (___,___)

A

(x,y)

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5
Q

There are 4 quadrants for the coordinated plane which quadrant are all the x ANY y values positive?

A

I

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6
Q

There are 4 quadrants for the coordinated plane which quadrant are all the x ANY y values negative?

A

III

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7
Q

There are 4 quadrants for the coordinated plane. Which quadrant are all the x values positive and the y values negative?

A

IV

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8
Q

There are 4 quadrants for the coordinated plane. Which quadrant are all the y values positive and the x values negative?

A

II

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9
Q

How do you convert a fraction into a decimal?

A

Divide the denominator into the numerator.

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10
Q

How do you convert a fraction into a percent?

A

Write a proportional statement. 1/2=x/100

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11
Q

How do you convert a decimal into a percent?

A

Multiply the decimal by 100.

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12
Q

What is a proportional statement?

A

Setting one fraction (proportion) equal to another. Example 1/2=100/200=250/500

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13
Q

What are the alphabetic symbols that are used in algebraic equations called? Example 2x+3=13

A

Variable

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14
Q

How do you find the perimeter of a rectangle?

A

2L+2W or L+L+W+W

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15
Q

How do you find the area of a square?

A

LxW

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16
Q

In line equation y=mx+b. What does the b represent?

A

y intercept

17
Q

In line equation y=mx+b. What does the y represent?

A

The y value of an ordered piar

18
Q

In line equation y=mx+b. What does the m represent?

A

slope (rise over run)

19
Q

In line equation y=mx+b. What does the x represent?

A

The x value of an ordered pait

20
Q

Given an equation of a line in the form y=mx+b how could you solve for m?

A

Divide the coefficient of y into mx AND b.

21
Q

What is a coefficient in an equation?

A

The number before a variable i.e. 3x 3 is the coefficient 25z 25 is the coefficient.

22
Q

Given an equation of a line in the form y=mx+b how could you solve for b?

A

Solve for m (the slope first) then plug that in to solve for b

23
Q

What is the order of operations when solving equations?

A

PEMDAS (Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction

24
Q

How do you add or subtract fractions with unlike denominators?

A
  1. Find a common denominator then solve.
25
Q

How do you multiply fractions?

A

Multiply the numerators together then the denominators. Reduce if necessary.

26
Q

How do you divide fractions?

A

Flip and multiply. Flip one of the fractions i.e. 1/2 becomes 2/1 then multiply. Reduce if necessary.

27
Q

What are the 3 types of fractions?

A

Improper, Mixed, and standard

28
Q

How do you convert a percent into a decimal?

A

Move the decimal point over 2 place values to the left. 25%=.25

29
Q

What are Whole numbers?

A

Non-negative positive numbers 4,12,859

30
Q

What are Natural numbers?

A

1 to infinity

31
Q

What are rational numbers?

A

Fractions (terminating)

32
Q

How do you convert a decimal to a fraction?

A
  1. Write the decimal as the numerator and 1 as the denominator. 2. Move the decimal point over for the numerator to make it a whole number. 3. Move the same number of place values in the denominator. Example 0.50 —> 0.50/1 I have to move the decimal 2 place values to the right to make 0.50 a whole number of 50., so I move the decimal place to values to the right for the denominator 1.00 to 100. Now I Have 50/100=1/2
33
Q

How do you convert a percent to a fraction?

A

Set the fraction over 100 and reduce if necessary Example 50% —> 50/100=1/2

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