Lesson 2: adding integers
I Can...
...accurately add positive and negative rational numbers.
Words to Know
Opposites: two numbers with the same absolute value but different signs
Additive Inverse: an integer and its opposite
Additive Inverse: an integer and its opposite
Examples
1. Add Integers with Same Sign
Video
Video
2. Add Integers with Different Signs
Video
Video
Tips
positive + positive = positive
negative + negative = negative
positive + negative = either; Take the difference of the two numbers, keep the sign of the bigger number.
negative + negative = negative
positive + negative = either; Take the difference of the two numbers, keep the sign of the bigger number.
Extra Examples
Click here for additional examples and self check quizzes
Problems of the Day
1. -15 + 8 + (-9)
2. |21 - 42|
2. |21 - 42|