Discovering Rules in Adding Integers

Move the sliders to add the given integers.

1) 3+(-3)=[br][br][br]

2) -5+5=

Choose the best way to describe the integers we are adding in nos. 1 &2.

A) They are the exactly the same. B) One is a positive and the other is negative. C) They are opposite of each other.

Observing the sums in nos. 1 & 2, what do you think is the sum of -539+539?

Tell whether the statement below is true or false.[br]The sum of any 2 opposite numbers is always 0.

False True

1) Add or[br]2) Subtract

a) -5+3=

b) 5+(-3)=

How do you describe the direction of the integers we are adding in items a& b?

B) They are going against or opposite each other. A) They are going to the same direction.

Exploration 2: Adding Integers with same signs.

Describe the sign of the sum for nos. 1 & 2.

Always positive It follows the sign of the integer of the one with the greater absolute value. Always negative

a) 5+4[br]b) -3+(-2)[br]c) -1+(-5)

What do you think happen when adding integers of the same sign.

They combine. They cancel each other. Always 0.

Information: Discovering Rules in Adding Integers