Range

Positive difference between largest and smallest values in a data set.

ex: 1,3,4,5,5,6,6,8,8,9
9-1=8

Mode

Frequently occurring number in a set of a data.
 Ex: 2,2,4,6,6,8,11. Mode is 2 and 6.

Median

Middle number in a set of data.  Ex; 1,3,6,8,9,10. Median is 7

Data Set

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

Measures of Central Tendency

A value that represents center of a data set.
Can be Mean, Median or Mode.

Line Segment(s)

Line Segments-
Piece of a line with starting and end points.

Perpendicular

 Perpendicular-
 Lines in the same plane that intersect at 90 degree angles.

 

Area of Parallelogram

ex; base=5 cm, height=3 cm
A= b x h
A= 5 x 3
A= 15 cm 2

Parallel Lines

Parallel Lines-
Lines on the same plane, that never cross or intersect.

Bed Mass Question

FEB 9, 2012

Expression

Expression- any single number or variable, or combination of operations involving numbers and variables.

What is a Mixed Number?

Mixed Number- Number made of a whole number and a proper fraction

Examples are; 1 1/2 and 2 5/8

How to answer number 24

How to answer number 24 in Number of the Day:

21; Use any two digits to make a proper fraction;

3/5

24;Draw a picture to represent the answer to number 21;

Numerical Coefficient

A numerical coefficient is a number that is multiplies a variable

An example is ; 2t

Divisibility Rules

Divisibility Rules

1-All whole numbers are divisible by 1.

2-All even numbers are divisible by 2. Numbers that end in 0,2,4,6,8

3-All whole numbers whos sum is divisible by 3 is divisible by 3

4-Divisible by 2 twice

5-All whole numbers that end in 5 or 0

6-Numbers divisible by 2 and 3 are divisible by 6

8-Number divisible by 2 three times are divisible by 8

9-All whole numbers whos sum is divisible by 9 are divisible by 9

10-All whole numbers that end in 0

Text book page 214-216

5

Write each addition statement shown by pattern blocks. Estimate then add.

How to find answer: You look at the shape and see how much make up the whole. eg if I had a square and 4 pieces make up the whole 4 would be your whole. Then you look at how much are shaded in. Look at the other shape and see how much is shaded in. Next you make a fraction. The denominator would be the number of the whole and the numerator would be how much is shaded. You should have 2 fractions. Add the both of the fractions numerators. Don't add the denominators. Once you added both numerators the denominator should be the same. Now you got your answer.

Number of the day #20

Write a fraction using the 1000s place as the denominator and the tenths place as the numerator.

How to find #20

First you look at the number of the day and find the 1000s and tenths place.

Next you make a fraction. Use the number in the 1000s place for the number at the bottom of the fraction. Use the number in the tenths place for the number at the top of the fraction.

If the top of the fraction is greater than the bottom it is a improper fraction. If the top is less than the bottom it is a proper fraction.

Textbook chapter review pg 146-147

Textbook Chapter review
pg 146

#4
Show how to find each amount

How I found the amounts for #4
First I made a ratio table. Then I put the percent and the number. Next I divided both the percent and number by 2. I divided the number and percent by 2 again to get to 75 faster. The last thing I did was multiply both the number and percent by 3. That's how I got my answer!

Textbook pg 137 #5

Question number 5 tells us to: use a calculator to change fraction to decimal. Round to place value indicated.

First you look at the fraction. Then on your calculator you put the number of the numerator and then press the divide sign, then you put the number of the denominator. When you press the equal button it will give you a number. Then you round it to the place value that the text book gives you.

Order of Operation

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



When you do the Bed Mas question you look for any brackets or exponents. If the question has any brackets or exponents do them first. Next you look for divison and multiplication you do it from left to right. Then last you do addtion and subtraction from left to right.





http://www.youtube.com/watch?v=Ef9EVFjSQso&feature=related

http://ca.ixl.com/math/grade-7