Divisibility Rules!

Divisibility is when a nnumber can be divided by another with no remainder or decimal.

2-
All even numbers, numbers that end in 0,2,4,6,8.

5-
All numbers that end in 0 or 5.

10
All numbers that end in 0.

Quotient - The answer to a divisibility question.
e.g. 12 divided by 2 is 6
6 is the quatient.

3-
The sum of all the digits must equal a multiple of 3.
e.g. 98 123 187
9 + 3 = 12 1 + 2 + 3 = 6 4 + 8 + 7 = 19
1 + 2 = 3 1 + 9 = 10
1 + 0 = 1

1378
1 + 3 + 6 + 8 = 19
1 + 9 = 10
1 + 0 = 1

45728163
4 + 5 + 7 + 2 + 8 + 1 + 6 + 3 = 36
3 + 6 = 9

6-
Any number that is divisible by 2 and 3.

9-
The sum of all the digits must equal 9.
e.g. 18 225 623781
1 + 8 = 9 2 + 2 + 5 = 9 6 + 2 + 3 + 7 + 8 + 1 = 27
2 + 7 = 9

Watch the video!


Sorry it's very late. :(

Measures of Central Tendency!

A value that represents the centre of a data set.

Can be mean, median, or mode.

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

23,4,5,6,5,4,5,3,4,5,6,7,5,34,3

2,3,3,3,4,4,4,5,5,5,5,5,6,6,7,34

Median - The middle number in a set of data, offer the data have been arrange in order.

Median of 2,5,6,8,9 is 6

Mode - The most frequently occuring number in a set of data.

Mode and most both have 4 letters.

Mode of 3,5,7,9 is 7

Mode of 1,2,3,5 is no mode

Mean - A mean of central tendency
the sum of a set of values divided by number
of values in the set

Mean of 6,4,8 is 6

Range - The positivew difference between the largest and smallest values in a the set

Range of 4,8,5,6,9,1,3,5,8,16

Outlier - A value that is much larger of smaller than the outlier data value
the data set may haver more than 1 outlier or zero outliers

Outliers are 1,67,68,67,64,65,100

Find mean, median, mode, range, and outliers for the following data sets.

Watch the video!

Equations with Randolph!

Equations - Mathematical statement with two expressions that have the same value.

Model 8 times a number plus 4 is 12.

5 - Numerical Coefficient

y - Variable

6 - Constant

Opposite Operations!

Watch the video!

Answer to Ayra's Probability Question!

Answer to Ayra's Probability Question!

Tree Diagram!

My sample space answer!

The answer is 1/6

Probability with Randolph!

What is the probability that Randolph will get a two and a one when he spins four sections spinner and rolls a dice?

Order of Operations!

B - Brackets
E - Exponents
D - Division
M - Multiplication
A - Addition
S - Subtraction

1. First, check if you have see any missing brackets in the question.
2. Then you go to the exponents and check you see any missing exponents in the question.
3. Then you go to division or multiplication and you have to start left, then right and also, you division first, then you divide, then you think is multiplication first and you multiply it!
4. Then you to addition or subtraction and you have to start left, then right and also, you addition first, then you add, then if you think is subtraction first and then you subtract it!

e.g.

6 - ( 5 - 3) + 10
\ /
+ 6 - 2 + 10
\ /
+ 4 + 10
\ /
= 14

Watch the video!

Test Corrections!

Questions and you get right?

1. is to approximate an answer.
2. is an estimate that is larger than the actual answer.
3. is an estimate that is smaller than the actual answer.
4. 12.63 + 9.05 + 7.92 = 296
5. 857.643-349.832=507.8110