Download presentation

Presentation is loading. Please wait.

Published byAnna Cornwell Modified over 2 years ago

1
ADDING & SUBTRACTING INTEGERS by Angela Gallacher NS 1.2 and AF 1.3

2
Integers Whole numbers and their opposites are integers such as 6 and -6. Zero is also a whole number. 0 6-6 Opposites

3
Negative Numbers Are Used to Measure Temperature

4
Negative Numbers Are Used to Measure Under Sea Level 0 10 20 30 -10 -20 -30 -40 -50

5
Negative Numbers Are Used to Show Debt Lets say your parents bought a car but had to get a loan from the bank for $15,000.When counting all their money they add in -$15.000 to show they still owe the bank.

6
INTRODUCTION TO INTEGERS We can represent integers using red and yellow counters. Red tiles will represent negative integers, and yellow tiles will represent positive integers. Negative integer Positive integer

7
INTRODUCTION TO INTEGERS The diagrams below show 2 ways to represent -3. Represent -3 in 2 more ways. -3

8
INTRODUCTION TO INTEGERS You may represent -3 by using 3 red tiles and any number of groups of +1 and -1 tiles

9
INTRODUCTION TO INTEGERS Tell which integer each group of tiles represents. -2 +1 +2

10
INTRODUCTION TO INTEGERS Tell which integer each group of tiles represents. -4 +4

11
INTRODUCTION TO INTEGERS Tell which integer each group of tiles represents. -4 +5 -3

12
INTRODUCTION TO INTEGERS If there are the same number of red tiles as yellow tiles, what number is represented? It represents 0.

13
Zero Pairs Zero Bank -3 + 4 = 6 – 10 = -6 + -7 = 12 + -7 = -3 – (-4) = 5 – (-9) = To use zero bank get out of slide show!

14
On your own -4 + 4 = -6 – 15 = -6 + 13 = 2 + -13 = -4 – (-4) = -9 – (-9) = Zero Bank

Similar presentations

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google