Grade 6 · Math · Lesson 2

Add and Subtract Integers

An integer is a whole number, its negative, or zero. You meet integers every day in temperatures below zero, elevations below sea level, and money owed. To add or subtract them well, you only need three rules and a number line you can picture in your head.

What this lesson teaches

1Add two integers using the same-sign and different-sign rules
2Rewrite any integer subtraction as adding the opposite
3Model integer sums and differences on a number line
4Determine the sign of a sum from the magnitudes of its addends

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