Ivorys term 2 Reflection

In term 2 we learned about percent,surface area and volume.
We learned how to find percents and represent them as fractions and decimals. We also learned to show percents on a 100 grid and how to use percent with tax prices.
We learned how to find the surface area of rectangular prisms, triangular prisms and cylinders. To help us we made nets and 3D shapes to help us find the surface area.
In volume we learned how to find the cubic squares in a shape.

I found it very easy to do all this, my tests were nearly perfect without studying but I never did any homework. In class I would help others to understand what they needed to do but I hardly did any textbook work. I didn’t do the blog, I didn’t scribe, I didn’t comment and even though I’m doing it now, don’t expect me to keep doing it.

Next term I’m probably not going to be any different with my work habits, but truthfully, I hardly know myself so maybe I will. Old habits die hard.

Ivorys Big book of Integers

Chapter 1: Grade 7 Integer Review:

Integers are are -negative- and +positive+ numbers. They can be represented as integer chips or on a number line. You get a zero pair when you have a negative and positive of the same number, example: -1 and +1 make 0.

Adding and subtracting integers:

-3-(-7)
you owe 3 and you pay back 7
=4

-3-7
you owe 3 and you owe 7
=-10

3-7
you have 3 and you owe 7
=-4

3+7
you have 3 and you have 7
=10

-3+7
you owe 3 and you have 7
=4

Chapter 2: Multiplying integers:

Sign rule: when you have an even number of negative integers the product will be positive, odd will be negative.
When you know that, multiply the numbers

- = negative integer chip
+ = positive integer chip

(+2)x(+3)=+6
2 groups of positive 3
+++ +++

(+2)x(-3)=-6
2 groups of negative 3
--- ---


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


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

Chapter 3: Dividing Integers:

Partitive division is when you find out how many groups of a number is in another number. It can be shown on a number line:

6 divided by 2=3
__>__>__>
_|_|_|_|_|_|_|_
0 1 2 3 4 5 6

-6 divided by (-2)=3
<____ <____ < ___
_|__|__|__|__|__|__|__
-6 -5 -4 -3 -2 -1 0

Quotative division is sharing groups.

(-6) divided by 2=-3
------
/ \
--- ---

When both integers are the same you can use partitive or quotitive to get the answer.

Chapter 4: Order of operation with integers:

You can solve more complicated questions using order of operations. We use B.E.D.M.A.S. which stands for:
Brackets
Equations
Division
Multiplication
Adding
Subtracting
Square brackets are always done first. Using this order you can solve questions like this:

(+5)x(-3)+(-6) divided by (+3)=
[(+5)x(-3)]+[(-6) divided by (+3)]=
(-15)+(-2)=-17

Ivorys estimating square roots blog post

Pg. 98-100

6. What is an example of a whole number that has a square root between 9 and 10?

9 10
81 100

examples: 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99.

7. Identify a whole number with a square root between 11 and 12.

11 12
121 144

examples: 122, 123, 124, 125, 126, 127, 128, 129, 130,131, 132, 133, 134, 135, 136, 137, 138,139 140, 141, 142, 143.

Ivory's Math Profile

My name is Ivory and I am in grade 8 math. I like math because it is subject that doesn't use a lot of words and spelling and I personally love numbers. The best thing that I did in math was getting full marks on a test I didn't even study for.

Last year in grade 7, I liked probability and B.E.D.M.A.S. I also found that the coordinate grid was really easy as well. I would do really well on everything unless I didn't listen very well and that was mostly in the third term when I broke my leg.

This year I will work to listen harder and accually study for tests. I need to do better on the blog with comments and do a scribe post. I also need to do all my homework and stay organized.