# Negative Numbers What do you understand by this?

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Negative Numbers What do you understand by this?

Understanding Negative Numbers We think of numbers being on a number line: These numbers are all positive numbers, although we don’t actually put the sign in front of each number

Understanding Negative Numbers The number line can also continue on past 0: These new numbers are negative numbers.

6 Negative Numbers The temperature scale is often seen vertically. 5 4 3 2 1 0 As the temperature goes below freezing we use negative numbers. Getting warmer Water freezing -1 -2 -3 -4 -5 -6 Getting colder

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 The scale changed, each division is worth? 8 10 12

Negative Numbers -30 -25 -20 -15 -10 -5 0 5 10 15 20 The scale changed, each division is worth? 25 30

Negative Numbers -11 -10 -9 -8 -7 -6 -5 What’s the missing number? -4 -3 -2 -1 0 1

Negative Numbers -28 -27 -26 -25 -24 -23 -22 What’s the missing number? -21 -20 -19 -18 -17 -16

Negative Numbers -28 -26 -24 -22 -20 -18 -16 What’s the missing number? -14 -12 -10 -8 -6 -4

40 35 30 25 20 15 10 5 0 -5 -10 -15 -20

Negative Numbers Which is colder -5 or -20? -30 -25 -20 -15 -10 -5 Why? 0 5 10 15 20 25 30

Can you order this set of numbers starting with the coldest? 20 - 15 - 20 5 -2 10

Discuss Temperature Difference & Change NNS Thermometer