4.2 6.3C Integer Operations with Models

4.2 6.3C Integer Operations with Models

Use a number line model to write an addition expression.

The model at the right can be expressed with the starting point,  $-1,$ and adding the directed magnitude of the arrow,  $-2.$  

 $-1+\left(-2\right)$  

Subtraction

On Sunday, the outside temperature in Alaska was 0 degrees. On Monday, the temperature decreased by 6 degrees. On Tuesday, the temperature decreased by another 2 degrees. Finally, on Wednesday, the temperature was 5 degrees less than on Tuesday. Which number line best represents the temperature on Wednesday?

Answer: C, the bottom number line

Multiple Choice

Which expression is shown on the number line?

• $14-9$

• $14+9$

• $9-\left(-14\right)$

• $9-14$

Determine Quotient and Remainder as a Fraction, Exact Answers

Exact answer means our answers will typically be an integer, fraction or mixed number.

Example:  Evaluate  $28\div23$  

Answer:   $1\frac{5}{23}$  

Assignment:

• GetMoreMath.com

• Daily Goal: 12 points