## Wednesday, December 9, 2009

Todays Math Class

In todays math class we found the are of G C I F

C, D, I, E = 25m

I, F, E = 12.5m squared

A, H, B = 40m squared

B, C, H, G = 70m squared

C, G, F, I, = 52.5m squared

The area of the Rectangle is 200m squared

Percent
30% means 30 out of 100

Percent is a fraction out of 100 or a denominator of 100

____
100

eg. 30% = 30 = 0.30
___
100

We can use money skills to think of fraction decimal percent

something something something
_______ ________ ________
something 1 100

25 50 10
____ ____ ___
100 100 100
(25%) (50%) (10%)

Find 50 % of \$84.60 = \$42.30

Find 25% of \$84.60 = \$21.23

Find 10% of \$92.30 = \$ 9.23

Find 50% of \$45.80 = \$22.90

Find 25% of \$ 50.00 = \$ 12.50

Find 10% of \$72.40 = \$7.24

Using a ratio table find 37.5% of 120

HOMEWORK

Using the ratio table find:

75% of 16

60% of 90

40% of 80

## Tuesday, December 8, 2009

### The Half and Differences between Numbers

The whole numbers that are between 7 and 13 are 8, 9, 10, 11 and 12.
The difference between 13 and 7 is 6.
13 - 7 = 6
Half of this difference is 3.
6 divided by 2 equals 3.
The number 10 is halfway between 7 and 13.
Like this:

7 + 3 = 10
Or...
13 - 3 = 10

Finding a halfway between numbers.

You can add the given numbers and divide it by two.
Like this..

70 and
170
70 + 170 = 240
And divide it by two. It equals
120.

And:

If you don't get it still, look at these examples we did during class...

1. What are the whole numbers between these given numbers?
68 and 72: The answer would be 69, 70, 71.
108.3 and 111.6: The answer would be 109 and 110

How? If you think of it as the alphabet, like, A B C, you know that
B is in between A and C.