exam review

Divisibility rules

0- end in zero
1-all numbers
2-even numbers
3-sum of the digits in 3
4-divisible by 2 twice
5-ends in 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

exam review

Measure of Central Tendency

Measure of Central Tendency) A value that represents a data set.


(A data set is a group of numbers that you arrange in order from least to greatest.)

exam review

Transformations

Translation- slide along a straight line 
Rotation- turn about a fixed point 
Reflection - a mirror image
 

exam review

Variables Expressions Ordered Pairs and Linear Relation

Variable- is an unknown number.

Expression- contains variables, operations and numbers in any combination.

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

Determine- the linear relation (equation) from a group or table of values.

exam review

I f they have $500 how much do they spend on rent

Milton family
food 35%
music 21%
clothes 15%
savings 6%
rent 25%
answer is $125

exam review

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

its a whole number

exam review

experiment probability- actually doing the trails

theoretical probability- what you expect to happen

exam review

probability -like a event occurring
probability- can be expressed ( said or written) using fractions, ratios and percents
outcome- one possible result of a probability experiment
favorable outcome- a successful result in a probability experiment
p (outcome)- is a short for saying something happening

exam review

1\2 = 0.5, 50%
0.75 = 3\4, 75%
80% = 4\5, 0.8

exam review

variable is an unknown number

- expression contains varibles, operations and numbers , in any combination

practice finding patteren
eg. 24, 21, 18, 15...
and write equations for the patterens
eg. 27-3n

exam review

Intergers
- negative numbers repersent values below zero and positive numbers repersent values about zero
-eg. above and below ground sea level

eg. 1+ (-2) = (-1) is an addition statement
eg. 3 - (-1) = 4 is an subtraction statement

exam review

Jim is one third his brothers age and his brother is12



                                    answer 12\3 = J
                                               
                                             

exam review

-mean-add up all values divided by how many values there are
-median-the middle number in a set of ordered values might be the mean of 2 middle values
-mode-the values that shows up the most
-range-positive diffrence betwwen largest and smallest values
-outlier- values that are big or too small compared to the other values

pizza fractions

you oder one whole pizza you eat 5/6 slices what will you have left the answer is in the question



it is 5/6

adding fractions

5/8 + 1/6 = 6/14

15/24 + 4/24 = 19/24

thats how you add fractions