Students work with positive and negative numbers on the number line. Wondy the Globe hosts, and the lesson ends with a quick quiz so learners can check what they remember. Try pausing at each quiz question and letting your learner answer out loud.
What's in this lesson
- Positive and negative numbers
- Opposites
- Comparing integers
- Adding integers on the number line
- Absolute value
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About this math lesson
Integers are the whole numbers and their opposites: …, −3, −2, −1, 0, 1, 2, 3, …. This free grades 6–7 math video uses the number line to explain negative numbers, compare integers and add positive and negative numbers.
Key ideas
- Numbers to the left of 0 are negative; numbers to the right are positive
- −5 is less than −2 because it is farther left
- Adding a positive number moves right; adding a negative number moves left
- Opposites, like 4 and −4, add to 0
Questions parents and teachers ask
What are integers?
Integers are whole numbers, their negatives and zero, such as −3, 0 and 7. Fractions and decimals are not integers.
How do you add negative numbers?
Start at the first number on a number line. Move right to add a positive number and left to add a negative number.
Where are negative numbers used in real life?
Temperatures below zero, elevations below sea level and money owed are all negative numbers.


