What do you understand by this? Negative Numbers What do you understand by this?

Understanding Negative Numbers We think of numbers being on a number line: 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 +

Understanding Negative Numbers The number line can also continue on past 0: -9 -8 -7 -6 -5 -4 -3 -2 -1 2 3 4 5 6 7 8 9 10 1 These new numbers are negative numbers. -

The temperature scale is often seen vertically. 6 Negative Numbers 5 4 Getting warmer 3 The temperature scale is often seen vertically. 2 1 Water freezing - 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 1 2 3 4 5 6 What’s the difference between: -2 and 6 -5 and -1 -3 and 6 -4 and 5 -6 and 6 Use the number line to make the jumps between the values.

The scale changed, each division is worth? Negative Numbers -12 -10 -8 -6 -4 -2 2 4 6 8 10 12 The scale changed, each division is worth?

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

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

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

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

5 10 15 25 20 30 35 40 -20 -15 -10 -5 Where is: 22 -7 34 -16 on the number line? What’s the difference between: 32 and -4 -10 and 25 -17 and 12 -1 and 32

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

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