Math: Exam Review

A spread sheet organizes date in columns and rows.

Know the ratio of circumference to diameter of any circle is always the same.

Circumference divided by diameter is pi, 3.14

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Circle Formulas

c = π d
c = 2 π r
d = 2r
A = π r²

Are is the measure of space, a two dimensional shape covers

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Sectors of circle graphs are made from central angles.

If the sector covers 25% of the graph the central angle is 25% of 360° which is 90° (0.25 x 360)



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Integers
negative numbers represent values below zero and positive numbers represent values above zero.

eg. above and below ground or sea level

1+ (-2) = (-1) is an addition statement

3 - (-1) = 4 is an subtraction statement

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Opposite integers have the same numeral but a different sign e.g 3 and (-3)

Know what a
(+) + (+) =
(-) + (-) =
(+) + (-) =
(-) + (+) =
(+) - (+) =
(-) - (-) =
(+) - (-) =
(-) - (+) =

Practice with different numerals in each situation

Math: Exam Review p.2

Write an addition statement for the following diagram


5 + (-12) + 4 = (-3)

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Variable is an unknown number

expressions contains variables, operations. and numbers, in any combination. (not an equal sign)

Practice finding the pattern
eg. 24, 21, 18, 15. . .
and write equations for the patterns
e.g 27-3n

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Plot ordered pairs and determine whether or not they make a pattern

Determine the linear relation (equation) from a graph or table of values





Y= 2x

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Mean - add up all values divided by how many values three are.

Median - the middle number in a set of ordered values, might be the mean of 2 middle values.

Mode - the value that shows up the most.

Range - positive difference between largest and smallest values

Outlier - values that are too big or too small compared to the other values. (Big one take away the little one)

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Write expressions or equations when given pictures
eg.


Create diagrams or pictures when given the expression of equation.

Expression:
3x - 4

Equation:
2y + 3 = 15

Answer to Ronalen's Probability Question

{If picture is too small}
{ 24 different answers }
Spinner:
Blue
Red
Green
Purple

Die:
1,2,3,4,5,6
1,2,3,4,5,6
1,2,3,4,5,6
1,2,3,4,5,6

Outcomes:
Blue{1}
Blue{2}
Blue{3}
Blue{4}
Blue{5}
Blue{6}

Red{1}
Red{2}
Red{3}
Red{4}
Red{5}
Red{6}

Green{1}
Green{2}
Green{3}
Green{4}
Green{5}
Green{6}


Purple{1}
Purple{2}
Purple{3}
Purple{4}
Purple{5}
Purple{6}

Probability Question

Kelly flips a coin and chooses one of her favorite snacks (green apple, banana, strawberry or an orange)

Organize all the outcomes using a tree diagram.

Textbook (7-9)

7. What is the area of each parallelogram?

a)
b x h
5 cm x 11 cm
cm= 55 cm

b) b= 7cm, h= 9 cm

b x h
7 cm x 9 cm=
63 cm

c) The height is 6.2 m and the base is 3 m

b x h
6.2 m x 3 m=
18.6m

8. Determine the area of each parallelogram.

a)

b x h
9m x 3m=
27m

b) b= 9.2 mm, h= 12.3 mm


b x h
9.2 mm x 12.3 mm=
113.16

c) The base is 4.5 cm and the height is twice the base

4.5 cm (divided by) 2 = 2.25 cm
b x h
4.5 cm x 2.25 cm=
10.125 cm

9. Workers are putting new flooring in the community centre. A section og the floor is going to have a parallelogram -shaped design. There are enough floor tiles to cover an area of 12m². The base will be 3m. What can the height of the design be?

3x 4= 12
12m

Order of Operations

B ~ Brackets

E ~ Exponents

D ~ Division

M ~ Multiplication

A ~ Addition

S ~ Subtraction

E.g.
2 x 4 + 1 =
\ /
8 + 1 =
9


Here is a video to help you:


Homework :
1.
Annie has asked to calculate 1.7 + 6 ÷ 2. She claims the answer is 3.85. Do you agree? Explain why or why not.

No, because:
1.7 + 6 ÷ 2 =
1.7 + 3 =
4.7





2.Put brackets in the following expression to get the largest value possible. What problem strategy did you use?

( 3 x 2.8 ) + ( 6.4 ÷ 4 ) = 10





3. Create a problem that could be solved using the following expression.
( 4 ÷ 2 ) + ( 6.7 x 2 ) = 15.4




Here is a quick game.

Test corrections #13

Question is "a figure resulting from a transformation is called a(n) ______________."

Answer is "Image"