Tonie's Algebra Post

Algebra

Algebra- Writing mathematical phrases using letters to represent numbers
eg. n+3 = 143x = 18

Variable- a letter that represents a number in an equation or expression
eg. n+11=20 (can be n, x, p, z, or any letter)

Constant- the integer in an algebraic expression or equation
eg. 18+n =35

Expression- Pattern (many answers)
eg. 5n

Equation- Only has one answer and an equal (=) sign
eg. 5n=20


Algebra Tiles

Isolate the variable
Cancel the constant using zero pair
Balance (do the same thing to the other side)
Verify to check

Tonie's Great Big Book of Integers

Chapter 1 Grade 7 Integer Review
(+4) + (-2)=

(+4) <>

Making Zero Pairs

-16 -5 +11 -2
+16 +5 -11 +2

+6 -10 -9 +3
-6 +10 +9 -3

-6 +2= -4
-6 -2= -8
-6 +10= +4
6-(-4)= 10
-2(-3)= 1
-3 - 6= -9
-3 - 2= -5

HW.
-3 (-7) = +4
-3 -7 = -10
3 -7 = 4
3 +7 = 10
-3 +7 = 4

Chapter 2: Multiplying Integers

(+2) x (+3) = +6
(2) x (3) = 6
(2) (3) = 6
If brackets are touching, they multiply
or
If a number is touching a bracket,it also multiply

(2) x (3) = 6
or
2 groups of (3) = 6
of means multiplying


(2) x (-3) = -6
or
2 groups of (-3) = -6


(-2) x (+3)
Remove 2 groups of (+3) (use zero pairs)


(-2) x (-3) = +6
^ remove 2 groups of (-3) = +6


Chapter 3: Dividing Integers

Partative Division - making parts




Quotative Division - sharing your total with groups



Chapter4: Order of Operation with Integers
To solve (+5) x (-3) + (-6) / (+3), I would first follow the BEDMAS. I'd put square brackets around (-6) / (+3). After, I would solve (+5) x (-3) and then I would add the two answers together and which would equal to -17.

(+5) x (-3) +[(-6) / (+3)] = ( -17)

(+5) x (-3) + (-2)

(-15) + (-2)

(-17)

Term 2 Reflection

It was really difficult for me to talk because I lost my voice after cheering for Sargent Park at St. Johns on Friday.

Tonie's Volume Scribe Post

Volume

Base (of a prism or cylinder)

• any face of a prism that shows the named shape of the prism
  
• the base of a rectagular prism is any face
  
• the base of a triangular prism is a triangular face
  
• the base of a cylinder is a circular face

Height (of a prism or cylinder)

• the perpendicular distance between the two bases of a prisms of cylinder

Volume

• the ammount of space an object occupies
  
• measured in cubic units

Orientation

• the different position of an object formed by translating, rotating, or reflecting the object

Volume of a Rectangle Prism

l x w x h

6x5=30cm^2
30cm2 x 10 = 300cm^3

Volume of a Triangular Prism

b x h/2 x h

5x7/2=17.5cm2

17.5cm2 x 10 = 175cm3

Volume of a Cylinder

d/2=r

8/2=r
4cm=r

3.14.r.r.h
3.14.4.4=50.24cm2
50.24cm2 x 10 =502.4cm3

Here are some videos to help you guys out (:

Here are some links to help you out more!! (:
link1
link2

link3

Answer:

Jumbo Container:
d/2=r
20/2=r
10=r

V=pi.r.r.h
V=(3.14 .10 .10) .40
V= 314.40
V=12,560 cm^3

Popcorn Lover's Container
d/2=r
30/2=r
15=r

V=pi.r.r.h
V=(3.14.15.15).40
V= 706.2 . 40
V=28,248cm^3

Martha should buy the 'Popcorn Lover's' container because the volume is bigger.

Answers:

*please feel free to correct me*

Tonie's Final Percent Post

Percent - means out of 100. Example 50/100

4.1 Key Ideas: To represent a percent you can use 100 grids. One shaded grid that has all the squares shaded in represents 100%. To show a percent that is larger than 100% you shade in more than on grid. To represent a percent between 0% and 1% you shade in a part of one square

4.2 Key Ideas: Fractions, decimals, and percents can be used yo represent numbers is various situations. Percents can be written as fractions and decimals.

4.3 Key Ideas: You can use some mental math strategies such as doubling, halving, or dividing by 10 to find percents of some numbers.

4.4 Key Ideas: Percents can be combined by adding to solve problems. You can ass the combined percent ammount to the original number. Percents can be used to determine ammounts that result from consecutive percent increases or decreases. You can multiply the original number by a single percent freater than 100.

Percent Review Video


Percent Review Video
Just incase my video won't show here.^
Check out my Percent Scribe Post(:
Percent Games.

Tonie's Percent Scribe Post

Pages 142-143 #s 3, 4, and 8

3. a)

c)

4. a)

b)

c)

8. The original price of a jacket was $84.00. A store manager marked the price down by 25.5%. By how much was the price reduced?

The price was reduced by $21.42.

Please. Feel free to correct my work (:

Tonie's Pay It Forward.

Part 1:

In my opinion, paying it forward means helping people or doing something helpful without asking for return. Then the people that you helped, helps more people and so on.

Part 2:

My Pay it Forward act of kindness was asking for donations door to door with Casey and Diana to donate for Christmas Cheerboard. We chose this activity because we want everyone in Manitoba to have a merry christmas and also, it is not fair that only some family are getting a christmas dinner. We helped the Christmas Cheerboard by donating the money that we raised. Casey, Diana, and I went door to door to ask for donations for Christmas Cheerboard. We raised about $80.00 . We did our act of kindness on december 16th, 17th, and 19th 2010.

Part 3:

Our act of kindness went GREAT. We raised about $80.00 for 3 days. I think it's good. I felt very proud of my group for walking around the neighborhood on a -25 day to ask people for donations. The people we asked for felt surprised that Diana, Casey, and I walked around on a very cold day. The staff at the Christmas Cheerboard felt thankful for our donation and hard work. Indeed we did. We asked a couple of people to pay it forward and most of them sounded very interested but some of them didn't. People acted interested when we told them what pay it forward meant.

Part 4:

The idea of Pay it Forward is important because, if people didn't pay it forward there would probably be alot of homeless people on the street that has nowhere to stay in to be safe and warm and has no food and water to survive. I believe that our act of kindness made a difference because we raised $80.oo which probably helped a couple families through out Winnipeg.

Tonie's Estimating Square Roots Scribe Post

Questions: 4 and 5

4.) Estimate the square root of each number, to one decimal place. Check with a calculator.

a) 72 b) 103 c) 55

a)

b)

c)

5. Estimate each value, to one decimal place. Check your answer with a calculator.

a) √14 b) √86 c)√136

a)

b)

c)

Here's a video that talks about estimating square roots.

This is a link about how to estimate square roots.

Feel free to correct me. (:

Tonie's Sesame Street Video

Group Members:

Diana, Casey, and Tonie

Part 1:

Two term ratio : Compares 2 quantities measured in the same units. (a:b)

Three term ratio : Compares 3 quantities measured in the same units. (a:b:c)

Part to part ratio : Compares different parts of a group to each other. (a:b, 2:5)
Part to whole ratio : Compares one part of the group to the whole group. It can be written as a fraction, decimal, & percent. (b:all letters, 5:8)
Rate; Compares 2 quantities measured in different units (2km/2hr)
Propertion reasoning : A relationship that says that 2 rates or ratios are equal. It can be written in fraction form. (2/3 = 6/9. (x3) )

Part 2:

The Original Video

" A Doll for Elmo "

Part 3:

Remake of " A Doll for Elmo "

" A Ratio for Elmo "

Our remake video was composing the definitions of Ratios, Rates, and Proportions

Tonie's Math Profile

Hey, my name is Tonie Reyes and I am a grade 8 math student. If someone asked me if I liked math, I would honestly say no. Math is my weakest subject and sometimes, I have a hard time understanding it. The best thing I have done in math class was fractions. I liked it because it was very easy, but as I got older it got harder and harder. I remember one time when I was in grade 4, I was in a group and we were given 3 different coloured paper. We had to cut the paper into 10 pieces and used it to make fractions.

Last year in grade 7, the best unit I studied was integers. At first it was a bit confusing but in the end it got easy. I did well on zero pairs , number lines, adding and subtracting integers. The unit I struggled in the most was Rotation, Translation, and Reflection. I didn't know how to show it on the coordinate grid but I knew the definitions. I will ask more questions, do my homework/work on time, and study harder so this year, I won't struggle so much.

This year for grade 8, I will pay attention more, check the blog more often for homeworks or tests, I will try to participate more in class by raising my hand if I know the answer, and also ask my peers or teachers for help to be a successful math student. I would like to learn algebra to get ready for grade 9.

Last year, the post i liked the most was about Integers. I liked it because i used different colours. But I would've made it better by putting more pictures, videos, and links. Blogging helped me a better student because it helped me refresh my memory, and when I miss a day of school or left my math stuff in school, I can just go on the computer and check the blog. This year, I am looking forward to making math videos, and other math websites.