Notes for June 06, 2011

Measure of Central Tendency- a value that represents the centre of a data set.

- can be the mean, medi

an and mode.

Data set- is a group of numbers that you mus

t arrange in order from least to greatest.

e.i 2,4,3,5,3,4,5,5,6,4,5,3,7,34,5,6

arrange from least to greatest: 2,3,3,3,4,4,4,5,5,5,5,5,6,6,7,34

Note: Before you find the Median, Me

an or Mode be sure that you arranged it from least to greatest.

Median- the middle number in a set of data after the data have been arranged in order.

If you left with two numbers you need to add them and divide them to get the median.

e.i

Mode- the most frequently occurring number in a set of data.

- mode and most have both 4 letters.

e.i

mode of 3,5,7,7,9 is 7 because 7 appeare

d the most.

mode of 1,1,1,2,2,2,3,3,3,4 is 1,2 and 3 because they appeared the most.

mode of 1,1,1,2,2,2,3,3,3 is no mode b

ecause they`re all last or second place.

Mean- a measure of central tendency.

- the sum of a set of values divided by the number of values in a set.

Range- the positive differences between the largest and smallest values in a data set.

Outlier- a value that is much larger or smaller than the other data value.

- the data set may have more than 1 outlier or zero outlier.

e.i

1,67,68,64,65,100 are 1 and 100 because the rest of them starts with 6 except for 1 and 100.

Here`s our homework for those who did not write it.

Find mean, median, mode, range and outliers.

18,19,79,17,20,12

14,14,16,15,16

98,202,99,91,2,95,89,88,94

Here`s a link to help you practice for mean, median, mode, range and outliers.

I also found a video to help you understand all about our lesson.

I hope this little information help you! :D

Notes for June 1

Equation- mathematical statement with two expressions that have the same value.

Model 8 times a number plus 4 is 12

8n+4=12

I.D= Identify 5y-6=19

variable- y

number coefficient- 5

constant- (-6)

Opposite operation

+,-

x, division

-,+

division, x

need more help?

algebra math

Need help?

Here are some of the games to understand:

variables and expressions

patterns and expressions

and graph too..

graph

Here are some of the videos to help you:

variable and expressions

graph

Notes for May 27,2011

Linear Relation- A pattern made by two sets of numbers that results in points along a straight line on a coordinate grid.

Graph- a visual way to show how two sets of numbers relate to each other.

Relationship- a pattern formed by two sets of numbers.

1 right 3 up

3d= f

Number of the Day (8-14)

Number of the day: 1234.567

8. Power- A base with an exponent is a power.
    

- Write a power using the digit  in the 100th (1234.567) place as the base and the digit in the 10s (1234.567) place as the exponent. 6³

9. Power in factor form
- 6 x 6 x 6= 216
- Six ,three times...not  six times three.

10. Cube - means three dimensional (3D)

- L x W x H  = N(umber) x N x N = N³
-  Cube the digit in ones place - 4 x 4 x 4 = 4³

11. Squared - means it has two dimensional (2D)
- L x W = N(umber) x N = N²
- Square the digit in hundreds place - 2 x 2 = 2²

12. Use a calculator,
- 1234.567 ÷ 3.55 = 347.7653521

- Rounding numbers...

• Look at the given nearest place value...
• Make the numbers that end in 1 through 4 into the next lower number that ends in 0. For example 74 rounded to the nearest ten would be 70.
• Numbers that end in a digit of 5 or more should be rounded up to the next even ten. The number 88 rounded to the nearest ten would be 90.

- Round it to the nearest 100th - 347.8

13. Product- is an answers into a multiplication question.

      Digit - a part of a number, a symbol to represent the number.

- Product of all the digits (use a calculator) - 1 x 2 x 3 x 4 x 5 x 6 x 7 = 5040

- Forget about the decimal.

- Remember if there is (are) 0 digit(s) in the number the answer is 0.

14. Prime numbers- numbers with 2 factor, one and itself, not 1 or 3 more.
- 3, 5, 7 are prime numbers of 1234.567


Try this number to practice number 8 - 14: 8749.294

Sorry I can`t find a video and a link for this scribe post.

*Answers...underlined numbers*

Number of the Day number 1 - 6

Number of the Day =  1234.567

1.Half the number
- Divide it by 2. (1234.567 / 2 = 617.2835)

2. Expanded form,
-True value of each digit
-1000 + 200 + 30 + 4 + 0.5 + 0.06 + 0.007 = 1234.567
- Wrong! (.4)  (200.000)  (30.500)

3.Write number in words
-One thousand two hundred thirty four and five hundred sixty seven thousandths

4.Rounding numbers
- Look at the given nearest place value...
-Make the numbers that end in 1 through 4 into the next lower number that ends in 0. For example 74 rounded to the nearest ten would be 70.
-Numbers that end in a digit of 5 or more should be rounded up to the next even ten. The number 88 rounded to the nearest ten would be 90.
-Round to the nearest 100: 1200

5. Place value

- What digit is in the tenths place? 0.5

6. Double the number
- Multiply it by two
- 1234.567 x 2 = 2469.134



Here is a number to practice number 1-6: 7455.305



ANSWERS *underlined numbers*

Answering Ghelo's Probability Question

Ghelo's Question:

What is the probability of spinning on BLUE? Express you answer as a fraction, ratio and percent.

Answer:

• Fraction: 2/8(1/4)
  
• Ratio: 1:4 (2/8)
• Percent:25%

Notes For January 24,2011

1st.) Question - p(heads and tails) when flipping a regular coin.

Use a tree diagram to show the sample space.

Express the answer as a percent.

Answer:

Probability>>>

Sample space:

• (h,h) (h,t)
• (t,h) (t,t)
  

Percent: 25%

2nd.) Question- p (rolling 4 and then a 2) with a six sided die.

Express as a ratio.

Answer:

Probability>>>

6 x 6= 36 all together.

Ratio: 1:36

3rd.) Question-p ( getting red and blue in any order) when spinning this spinner twice.

Find the fraction, ratio, and percent.

Answer:

Probability>>>

Fraction: 2/16( simplified 1/8)

Ratio: 2/16, (1/8)

Percent: 12,5%

4th.) Question- Create a tree diagram to show all the possible outcomes when a coin is flipped and a spinner is spun with five equal sections labelled run, skip, jump, twirl, and twist.

(find p (heads and jump))

Answer:

Probability>>>

Fraction: 1/10

Ratio: 1:10

Percent: 10%

Random- An event which every outcome has an equal chance of occurring.

Watch this video to understand more about probability...

Need more practice??? here are some games to help you....just press the link>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>PRobaBility!!!!

Answering Mary's Probability Question

>Mary's Question:

What is the probability on spinning p(yellow) on my spinner?

Express as Fraction, Ratio and Percent.

Answer:

• Fraction:2/8, 1/4
  
• Ratio: 2:8, 1:4
• Percent: 25%

Answering Norien's Probability Question

Question:

What is the probability of spinning a BLUE ?

Express your answer in a fraction, ratio, and percent.

Answer:

• Fraction:3/12, 1/4
  
• Ratio: 3:12, 1:4
• Percent: 25%

Answering Ian's Probability Question

Question:

• Whats its the probability of the spinner turning on Yellow?
  

Explain in Fraction, Ratio and Percent.

Answer:

• Fraction: 1/4
  
• Ratio: 1:4
• Percent: 25%

Answering Tinille's Probability Question

Tinille's Question:

• What is the p( green or gold) stars? Express as Fraction, Ratio and Percent.

Answer:

• Fraction:4/6
• Ratio:4:6
• Percent: 66.6%
  

Answering Oudorn's Probability Question

Oudorn's Question:

What is the probability of spinning p(1, 3, or 6)? Express as a Fraction, Ratio, and Percent.

Answer:

• Fraction: 3/8
• Ratio: 3:8
• Percent: 37.5%

Answering Amiel's Probability Question

Amiel's question:

Whats the p(blue ice cream)?

Express as a fraction, ratio, and percent.

Answer:

• Fraction: 1/2
• Ratio: 1:2
• Percent: 50%

Joshua's question is: What is the probability of spinning a green on this spinner? Please express as a fraction, ratio and a percent.

The Awnsers are ...
Fraction : 2/8 , or 1/4
Ratio : 2 : 8 or 1: 4
Percent : 25 %

Answering Joshua's probability question

The question is: What is the probability of spinning a green on this spinner? Please express as a fraction, ratio and a percent.

The answer: Fraction 2/8(simplified 1/4)

Ratio 1:4

Percentage 25%

Notes For January 6, 2011

1. Out of 100 is also known as Percent.

2. A number over 1 is also known as Decimal.

3. A whole number over a whole number is also known as Fraction.

Convert the following fractions to decimals and percents. Show your work.

1. 1/2

2. 3/4

3. 2/5



4. 1/3


Convert the following decimals to percents and fractions in lowest terms.

1. 0.125

2. 0.6

Homework

Which percent is larger 50% of 196 or 25% of 396?

Sorry I don't have video or link to add.