|Adding negative numbers intro|
|Exercise Name:||Adding negative numbers intro|
|Math Missions:||7th grade (U.S.) Math Mission, Arithmetic essentials Math Mission, Pre-algebra Math Mission, Mathematics I Math Mission|
|Types of Problems:||1|
The Adding negative numbers intro exercise appears under the 7th grade (U.S.) Math Mission, Arithmetic essentials Math Mission, Pre-algebra Math Mission and Mathematics I Math Mission. This exercise practices adding negative numbers to either positive or negative numbers.
Types of Problems
There is one type of problem in this exercise:
- Find the sum: This problem provides two numbers. The user is asked to find the sum of the numbers and write it in the space provided.
Knowledge of arithmetic operations on integers can assist on this problem, as would a model for operations on integers (such as a number line model).
- To add two negatives find the sum of the magnitudes of the numbers and place a negative sign in front of it.
- To add a negative and a positive number, find the difference of the magnitudes of the numbers and "keep the bigger sign." For example, if the negative number was larger in magnitude, the net will be negative.
- A number line model can be used with thinking of adding a negative as walking or moving steps to the left.
- 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.