873 Math Blog

Hiaku Poem:

Positive Integers

Positive numbers
Only on the right-hand side
Use a number line


Diamante Poem:

Positive and Negative

Positive
Totaled, together
Combining, adding, increasing
Sum, blend---minus, smaller
decreasing, taking, shrinking
Less, diminished
Negative


Cinquain Poem:

Integers

Integers
Positive, negative
adding, subtracting, dividing
On the number line
Numbers

Standard Form:

ex. 7 + 8 + 5 = 20 9 + 8 - 4 = 13

Standard form is when you write down numbers without the brackets. (also gr. 7 form) And you just write it down the way you usually write it down. Like 5 + 5 = 10 or 10 - 4 = 6

ex. with brackets- (7) + (8) + (5) = 20 (9) + (8) + (-4) = (13)

Bracket form is when you write down brackets around your numbers, and when subtracting, you write down a minus sign beside the subtracting number.

One day, in a small town, lived a girl. She had 2 cats. But one day, one of the cats ran away. The girl was very worried when she found him missing. So she went out to find him. It was a very nice day, and the girl looked up in the sky. She noticed a little pattern in the sky with the clouds. She could not tell what it was, so she tried climbing up a tree to get closer. But the tree was too high. Trying to measure it in her mind, she heard a meowing sound. It was her cat! She wanted to get to him, but he was very high up. So again she estimated how long it was. She thought it was about 6.4 feet tall. Her cat tried to come down, but it could not. So the girl started to climb up. She was lucky that there were lots of little branches to put her feet on. They even looked like they were almost perfectly lined up. There were about 18 of them. The girl went up 5, but then she dropped her bag. So she had to go down 5 to get it.

0 + 5 = 5 5 + (-5) = 0

Once she got it, she went up 8 branches. Then up 6 more.

0 + 8 = 8 8 + 6 = 14

She was almost there! But then her cat went down 5. Then back up one because he got scared.

18 + (-5) = 13 13 + 1 = 14

They were on the same branch. The girl grabbed her cat, and climbed down all branches.

14 + (-14) = 0

Then when the girl looked up in the sky again, the pattern was a lot more clear now. They were numbers. And they said:

0 + 5 = 5 5 + (-5) = 0 0 + 8 = 8 8 + 6 = 14 18 + (-5) = 13

13 + 1 = 14

At first the girl did not get it, but then she realized: she just did integers math! When she got home, her cat never ran away again.

The End

Mean

• Put raw data in ascending order

sum of all data over number of data

• If you have an outlier, it changes the mean

Median

• Put raw data in ascending order


• Find the middle number


• If you have 2 middle numbers, find the average


• Median is good when you have outliers

Mode

• Put raw data in ascending order


• Most common number


• You can have more than 1 mode

Range

• Put raw data in ascending order


• Largest data minus smallest data