Math Exam Review

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 a subtration statement

Opposite integers have the same numeral but different sign eg. 3 and (-3)

Know wat a (+)+(+)= (+)-(+)=
(-)+(-)= (-)-(-)=
(+)+(-)= (+)-(-)=
(-)+(+)= (-)-(+)=

practice with different numerals in each situation

Math Exam Review

Divisible- means when a number can be divided by another number, with no remainder or decimal

It is a whole number



Divisibility Rules

0- end in zero
1- all numbers
2- even numbers
3- sum of the digits is 3
4- divisible by 2 twice
5- ends in a 0 or 5
6- divisible by 2 and 3
8- divisible by 2 thrice
9- sum of the digits is 9
10- ends in 0

Answer to Jennifer's Probability Question

Jennifer's Question:

Johnny picked out of a bag with 5 chocolate bars.He had to pick one chocolate bar.

He also had to spin a spinner to determine how many times he would have to take a bite out of the chocolate bar.

Show all the possible outcomes using a chart or table. What is the sample space?

My Answer to Jennifer's Question:

Sample Space:

(1,Small Aero),(1,Kit Kat),(1,Coffee Crisp),(1,Large Aero),(1,Rolo)

(2,Small Aero),(2,Kit Kat),(2,Coffee Crisp),(2,Large Aero),(2,Rolo)

(3,Small Aero),(3,Kit Kat),(3,Coffee Crisp),(3,Large Aero),(3,Rolo)

(4,Small Aero),(4,Kit Kat),(4,Coffee Crisp),(4,Large Aero),(4,Rolo)

Probability Question

Charles has 7 marbles in his pocket.




He takes 1 marble out of his pocket.

What is the probability that the color blue will be picked?

Chapter 03 Review 16-17

Area of a triangle

16. What is the area of each triangles?

a.)36m2

b.)b=5.2m,h=5.3m

17. Aleta has a pasture for her horses. The pasture runs alongside a creek as shown.

a.) What is the approximate area of the pasture? Explain how you determined your answer.

b.) Why is the area approximate?

The creek is not in a straight line

Video of Area of a Triangle:

http://www.youtube.com/watch?v=xz6gBA0M9FY

Order of Operations

Order of Operations:

B-Brackets
E-Exponent
D-Division
M-Multiplication
A-Addition
S-Subtraction
Here is an example we did in class:












1.)Annie has been asked to calculate 1.7+6 divide by 2.


She claims the answer is 3.85.


Do you agree?Explain why or not.

Answer:
I do not agree because she didn't do the B.E.D.M.A.S.The correct answer would be 4.7.
This is how i did do get 4.7 :

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

There could be two possible answers:

Create a problem that can be solved using the following expression:

Meagan had money and her parents borrowed it. her mom ows her $2.5 and her dad ows her $1.25 and each of her sibling ows her money Cj, John, Joshua, Kisha, and Marry ows her $1.6. She collected all of them and got $11.75

Video of Order of Operations:

Test corrections Question 15

A (n) translation arrow shows the distance and direction a figure has moved on a coordinate grid.

Video of translation arrow: