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## Negative Numbers

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**Negative Numbers**What do you understand by this?**We think of numbers being on a number line:**Understanding Negative Numbers ∞ 0 1 2 3 4 5 6 7 8 9 10 These numbers are all positive numbers, although we don’t actually put the + sign in front of each number +**0**1 2 3 4 5 6 7 8 9 10 The number line can also continue on past 0: Understanding Negative Numbers -9 -8 -7 -6 -5 -4 -3 -2 -1 These new numbers are negative numbers. -**6**5 4 Getting warmer 3 The temperaturescale is often seen vertically. Negative Numbers 2 1 Water freezing 0 - 1 - 2 As the temperature goes below freezing we use negative numbers. Getting colder - 3 - 4 - 5 - 6**Negative Numbers - This time the scale is horizontal**-6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6**Negative Numbers**-12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 The scale changed, each division is worth?**Negative Numbers**-30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 The scale changed, each division is worth?**-11**-10 -9 -8 -7 -6 -4 -3 -2 -1 0 1 Negative Numbers -5 What’s the missing number?**-28**-27 -26 -25 -24 -23 -21 -20 -19 -18 -17 -16 Negative Numbers -22 What’s the missing number?**-28**-26 -24 -22 -20 -18 -14 -12 -10 -8 -6 -4 Negative Numbers -16 What’s the missing number?**40**35 30 25 20 15 10 5 0 -5 -10 -15 -20**-30**-25 -20 -15 -10 -5 0 5 10 15 20 25 30 Which is colder -5 or -20? Why? Negative Numbers**20**- 20 - 2 5 - 15 10 Can you order this set of numbers starting with the coldest?**Discuss Temperature Difference & Change**NNS Thermometer