Negative Numbers and the Number Line Unit 2

Negative Numbers and the Number Line

Unit 2 - Negative Numbers

Vocabulary Negative Number – a number that is less than zero. Opposite – having the same numeral but different signs. Example: -6 is the opposite of 6

Integer Words & Phrases Positive • • Above sea level Credit Gain Above zero Income Profit Receives Negative • • Below sea level Debit Loss Below zero Spends Withdraws Expenses Write a check for

Situations with Integers Write a positive or negative number to represent each situation. 1. 36˚F below zero - 36˚F 2. A debit of $10, 540 - $10, 540 3. 29, 035 feet below sea level - 29, 035 feet A + sign isn’t necessary 4. A gain of 45 yards for a positive number, but you may include it if you +45 yards want to.

Complete the Number Line Example On horizontal number lines, numbers to the left of zero are negative.

Draw the Number Line Example Draw a horizontal number line to represent each set of numbers. -9, -5, -4, -2, 1, 3, 5

Draw the Number Line Example Draw a vertical number line to represent each set of numbers. -1, 3, -4, 2, 0, -6, -2 On vertical number lines, numbers below zero are negative.

Find the Opposite of Each Number Example 1. 10 -10 2. -15 15 3. 86 -86 4. -135 5. -12 12 6. 295 -295

Writing Inequalities Example Complete each inequality using < or >. Use a number line to help you.

Find the Opposite of Each Number Independent Practice Find the opposite of each number. Place both the number and its opposite on a number line. 1. 5 -5 2. -8 8