The Negative number addition and subtraction: equivalent expressions exercise appears under the 7th grade (U.S.) Math Mission. This exercise practices finding equivalent expressions with negative numbers.
Types of Problems[]
There is one type of problem in this exercise:
Find the equivalent expression.
- 1. Which of the following expressions are equivalent?: This problem has an equation and the user is asked to find which other expression is equivalent.
Strategies[]
Knowledge of adding and subtracting negative numbers is essential to ensure success in this exercise.
- 1. Number lines are useful for adding and subtracting negative numbers.
- 2. The numbers in this exercise are pretty small, so this exercise is easier for speed badges.
Real-life Applications[]
- Negative numbers are used to represent land below sea level.
- Negative numbers are used to describe values on a scale that goes below zero, such as the Celsius and Fahrenheit scales for temperature.