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Chris Clements

-3. -11. Negative Numbers. Differences using positive and negative numbers. -6. Chris Clements. <date>. Learning Objective:. LO: I can find the difference between positive and negative integers. . Negative numbers .

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Chris Clements

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  1. -3 -11 Negative Numbers Differences using positive and negative numbers -6 Chris Clements

  2. <date> Learning Objective: LO: I can find the difference between positive and negative integers.

  3. Negative numbers Negative numbers are the result of a bigger number being subtracted from a smaller number. 5 - 8 = -3 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10

  4. Negative numbers Negative numbers are often used when calculating temperatures. When using degrees centigrade (ºC) a temperature below freezing is shown by a negative number. The thermometer is showing that the temperature is - 6ºC. 10 ºC The higher the positive number the warmer the temperature. 5 0 The lower the negative number the colder the temperature. REMEMBER: -1 is the highest whole negative number. -5 -10

  5. Negative numbers What is the difference between the following numbers? 4 -3 -5 -4 -3 -2 -1 0 1 2 3 4 5 The answer is 7 An efficient method for doing this calculation is to add together the positive number to the negative number; So 4 + 3 = 7 the difference is 7.

  6. Negative numbers Using the method shown can you find the difference between the following numbers? 11 14 9 -2 6 -8 13 27 12 -1 18 -9 31 44 24 -7 32 -12

  7. Negative numbers What is the difference between the two temperatures? 10 10 ºC ºC 5 5 -6ºC 9ºC 0 0 -5 -5 The difference is 15ºC -10 -10

  8. Negative numbers What is the difference between the two temperatures? 10 10 ºC ºC 5 5 -9ºC 12ºC 0 0 -5 -5 The difference is 21ºC -10 -10

  9. Negative numbers What is the difference between the two temperatures? Spain Sweden 35ºC 23ºC -12ºC Mexico Iceland 66ºC 39ºC -27ºC

  10. Negative numbers What is the difference between the two temperatures? When finding the difference between two negative temperatures simply take away the lowest temperature from the highest temperature. UK Norway -3ºC -8ºC 5ºC Canada Iceland -15ºC -27ºC 12ºC

  11. -11ºC 7ºC -8ºC -7ºC Steps to success 1) Difference between a negative number and a positive number (add numbers together) Difference is 8 + 7 = 15ºC 2) Difference between two negative numbers; lower negative number subtract the higher negative number. Difference is 11 - 7 = 4ºC

  12. <type here> Activity

  13. -4ºC 4ºC Plenary Which two numbers have a difference of 2? -1 -0.5 0 0.5 1 1.5 How much colder is it in Birmingham than Paris? Birmingham 10 10 ºC ºC The following day the temperature in Paris is 4ºC. Birmingham is 8ºC colder. What is the temperature in Birmingham? 5 5 0 0 -5 -5 -10 -10 Paris

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