Negative Numbers and the Number Line

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Presentation transcript:

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 Negative Above sea level Credit Gain Above zero Income Profit Receives 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 gain of 45 yards +45 yards A + sign isn’t necessary for a positive number, but you may include it if you 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 10 -10 2. -15 15 3. 86 -86 -135 135 -12 12 295 -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. 5 -5 2. -8 8