| Integer addition and subtraction: number line interpretation | |
|---|---|
 | |
| Description | |
| Exercise Name: | Integer addition and subtraction: number line interpretation |
| Math Missions: | 7th grade (U.S.) Math Mission |
| Types of Problems: | 1 |
The Integer addition and subtraction: number line interpretation exercise appears under the 7th grade (U.S.) Math Mission. This exercise to reinforce the understanding of the geometric and algebraic version of numbers.
Types of Problems[]
There is one type of problem in this exercise:
- Interpret the expression: This problem provides an arithmetic expression involving integers and either addition or subtraction. The student is expected to find the selection that correctly interprets the situation.
Interpret the expression
Strategies[]
Knowledge of operations on positive and negative numbers and comfort with word problems are encouraged to ensure success on this exercise.
- A positive number is on the right and a negative is on the left.
- Adding is moving right and subtracting is moving left.
- A negative number can be thought of as "flipping over."
Real-life Applications[]
- Familiarity with operations on integers will lead into comfort with other more advanced numbers, such as radicals, fractions and even imaginary numbers.
- Many human calculators prefer geometric models of arithmetic to attain estimates efficiently.