Exam Review Part 4

Fraction- Out of any whole number

Decimal- Out of 1

Percent- Out of 100

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Practice:

1. Find 50% of 10 =
2. Find 77% of 17 =
3. Find 20% of 30 =
4. Find 40% of 25 =
5. Find 65% of 90 =

Still can't do it? Remember, when finding the percent of something, you turn it into a decimal then multiply the decimal by the number you wanted to find a fraction of. For example:

Number 2 states: Find 77% of 17

You then: 0.77 x 17 = 13.09 <------------ 77% turns into a decimal.

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Here is a helpful video:

Here are s0me helpful games:

GOOD LUCK ON THE EXAMS EVERYONE!! :)

*if there was no colour, again, my computer is messed up.

Convert Fractions, Decimals and Percents

2/4 = 50% or 0.5

75%= 3/4 or 0.75

0.6= 60% or 3/5

Solve algebraic equations

a+6=7 b-5=3 2=s-6
a+6-6=7-6 b-5+5=3+5 2+6=6-6+6
a=1 b=8 7=6

7=5+d 3g/3=18/3 12/4=4k/4
7-5=5-5+d g=6 3=k
4=d

Exam Review Part 3

Radius - distance from the center of a circle to the edge, represented by the variable "r".

Diameter - The distance from across a circle through it's center. Represented by "d".

Relationship between radius and diameter? The radius is half of the diameter and the diameter is twice the radius.

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Constructing Circles:

1. compass
2. trace a circle
3. string

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Practice:

• Diameter if radius is 6 : 12
• Radius if diameter is 9: 4.5

Now try these:

-What is the radius id diameter equals 10?

-If you multiply your diameter from the first question and divide by 2, what would the radius make?

-What if the radius was 3 and you doubled, what would be the diameter?

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Pi

- the ratio of the circumference of a circle to it's d

iameter.

- approximate value is 3.14

- pi = c/d

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Formulas:

d = 2r 2r = d r = d/2 d/2 = r

(pi) d = c c/(pi) = d c = (pi) d

2 (pi) r = c c/(pi) = 2r c = 2(pi) r

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Thanks for reading!

If there was no colour, it's because my computer is messed up.

Bye! GOOD LUCK AT MATH EXAMS!

Exam review

COORDINATE GRID

SORTA!!!

Integers

Answer these on you own and you

will be fine :D

(-4) + (+3) =

(-3) + (+4) =

(-5)+ (+3)=

(+3)- (-8)=

(+5) - (-7) =

Bye:D comment please.

Integers

[-9]+[+2]=-7
[+3]-[+2]=1
[-5]+[+6]=1
[-2]-[+2]=0
[+5]+[+5]=10
[+7]-[-3]=10
[-1]+[+5]=4
[0]-[-6]=6
[+4]+[-6]=-2
[-8]-[+10]=-18
(-2)+(+5)=3

Math Questions

a + 6 = 8                                  b - 5 = 2                      2 = s - 5

8 = 5 + d                                 4g = 19                        13 = 5k

6 =  k                                      z = 4                            3n + 5 = 15     
       6                                      8