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### Course: 6th grade (Eureka Math/EngageNY)>Unit 3

Lesson 1: Topic A: Understanding positive and negative numbers on the number line

# Number opposites

Learn what it means for a number to be the opposite of another number.
The opposite of a number is the number on the other side of 0 number line, and the same distance from 0.
Here are a couple of examples:
start color #e84d39, minus, 4, end color #e84d39 is the opposite of start color #1fab54, 4, end color #1fab54.
start color #1fab54, 3, end color #1fab54 is the opposite of start color #e84d39, minus, 3, end color #e84d39.

## Let's practice!

Problem 1A
• Current
Move the dot to the opposite of 2.

## Challenge problems

Use the following number line for the questions below.
Problem 2A
• Current
Which of the following is the opposite of A?