INTEGER REVIEW AND ADDITION OF INTEGERS

Mrs. Williams 7th grade Math

2 below zero on a thermometerWe say…

Words to Integers

1. Sea Level2. 300 ft. above sea level

3. 2 feet below sea level

Integers on a map

1. Can I borrow $2?2. I have $14.3. I deposited $300.4. I withdrew $20.5. I have a debit of $5 for a

payment.6. I have a credit of $60

for the last purchase.

Integers and money

1.40 points in –the-hole2.15 to the good3.I gained 3 pounds.4.I lost 3 tickets.5.There was a decrease of 2

desks.6.There was an increase of 2

students.

Other ways to “integer talk”

Watch BrainPop video

Intro to Adding integers

When the signs are the same, find the sum.

In other words, ADD!! And keep the sign of the larger.

When the signs are different, find the difference.

In other words, Subtract! And keep the sign of the larger

number.

Adding Integers Notes

Adding integers

Same sign – Sum+

Different signs – Difference

-

24+32-44+ -5

17 + -6-72+21

Mrs. Williams’ turn:

-32 + -13

44+ (-56)

How does this work?

On a number line…. Move to the right with a +, but a -

will turn it around.

Cancelling one another out…For every +, a – will cancel it out.

Let’s do together:

Page 12 Problems

Now you finish the rest with a partner.

Now it’s your turn…

Complete the rest on your own.

You will go over these with Mr. Graves.

NO CALCULATORS!!

Good Luck!!