Adding Integers

Grade 7: The Learning Equation Math

12.04 Adding Integers

	Number Operations	Exploring Integers - Optional Refresher pp 28-9
		Activity 12.04 Refresther pp 30-1

Learning Objectives:

The student will:

add integers concretely, pictorially, and symbolically.
Drag the appropiate number of tiles to each side of the + sign to model the question. When your model matches the question, move all of the tiles to the left of the + sign. If you have yellow and red tiles, try placing a red tile on top of the yellow tile to show a zero pair. Repeat with all of the zero pairs to see the integer sum modelled by each set of tiles.

Adding Integers	Explanation
	3 + 4 = 7
	6 + 7 = 13
	-3 + -4 = -7
	-6 + -7 = -13
	-1 + 3 = 2 1 positive tile cancels the negative tile.
	-2 + 4 = 2 2 positive tiles cancel the 2 negative tiles.
	-3 + 5 = 2 3 positive tiles cancel the 3 negative tiles.
	-3 + 1 = -2 1 negative tile cancels the positive tile.
	-4 + 2 = -2 2 negative tiles cancel the 2 positive tiles.
	-5 + 3 = -2 3 negative tiles cancel the 3 positive tiles.

Adding with Algebra Tiles

FUNBRAIN - Number Line

Adding and Subtracting and Positive and Negative Numbers

Adding Integers Slide Rule

Integer Bars: Learning Fractions and more with On-line Manipulatives

Integer Calulator

Lesson on Addition of Integers

Integer Sum Calculator

This applet adds numbers up. Input numbers into the text field, then click "enter".

source: An Addition Applet

Adding Integers	Range
	-10 to 10
	-100 to 100
Hold down Shift and click the Reload button on your browser to try again. source: Subtraction 2

Adding Integer Calculations

You can calculate integer sums on a scientific calculator. Use this calculator to check the chart on the right and learn the patterns, then try it out for yourself.

Press Reload/Refresh if the calculator does not show properly.