🟩 Vocabulary
What do we call the distance a number is from zero on a number line?
Absolute value or Magnitude
When adding a positive number on a number line, which direction do you move?
To the right
5 + (−2) = ?
3
−5 − 6 = ?
-11
You deposit $10 into your account. Is this positive or negative?
Positive
A positive number and a negative number with the same magnitude form a _____.
Zero pair
When adding a negative number on a number line, which direction do you move?
To the left
−6 + 4 = ?
-2
4 − (−3) = ?
7
Your balance is −$15. You deposit $20. What is your new balance?
$5
What term describes money taken out of a bank account?
Withdrawal
To subtract a number, you add its ___________.
Opposite
−7 + (−3) = ?
−10
2/3+(−1/6) = ?
-11
The temperature was −3°F and dropped 5 more degrees. What is the new temperature?
−8°F
What does a negative number usually represent in a money situation?
Debt or a Withdrawal
Start at −2. Add −5. Where do you end up?
−7
Which has the greater magnitude: −8 or 5?
-8
Rewrite: −2 − (−7) as an addition problem.
-2+7
A diver is at −12 feet. They rise 7 feet. Where are they now?
−5 feet
What word describes how far above or below sea level something is?
Elevation
Start at 3. Subtract −4. Where do you land?
7
Explain why −4 + 4 = 0.
They form a zero pair.
Why does subtracting a negative increase the value?
Because you are adding its opposite
Sea level is 0. A mountain is at +2,500 ft and a valley is at −1,200 ft.
What is the difference in elevation?
3,700 ft