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Understanding negative numbers

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Understanding negative numbers

1. 1. Negative NumbersWhat do you understand bythis?
2. 2. Understanding Negative NumbersWe think of numbers being on a numberline:These numbers are all positive numbers,although we don’t actually put the + signin front of each number∞
3. 3. Understanding NegativeNumbersThe number line can also continue on past 0:These new numbers are negative numbers.
4. 4. Negative NumbersThe temperaturescale is often seenvertically.As the temperaturegoes belowfreezing we usenegative numbers.0123456- 1- 2- 3- 4- 5- 6Water freezingGetting warmerGetting colder
5. 5. Negative Numbers - This time the scale is horizontal0 1 2 3 4 5 6-1-2-3-4-5-6
6. 6. Negative Numbers0 2 4 6 8 10 12-2-4-6-8-10-12The scale changed, each division is worth?
7. 7. Negative Numbers0 5 10 15 20 25 30-5-10-15-20-25-30The scale changed, each division is worth?
8. 8. Negative Numbers-4 -3 -2 -1 0 1-6-7-8-9-10-11 -5What’s the missing number?
9. 9. Negative Numbers-21 -20 -19 -18 -17 -16-23-24-25-26-27-28 -22What’s the missing number?
10. 10. Negative Numbers-14 -12 -10 -8 -6 -4-18-20-22-24-26-28 -16What’s the missing number?
11. 11. 0510152520303540-20-15-10-5
12. 12. Negative Numbers0 5 10 15 20 25 30-5-10-15-20-25-30Which is colder -5 or -20? Why?
13. 13. Can you order this set of numbers starting withthe coldest?205- 2- 15 10- 20
14. 14. Discuss TemperatureDifference & ChangeNNS Thermometer