2. Thermometer Read the temperature on the thermometer as it changes. 0 -10 -20 -30 10 20 30 40 50 60 oCoC

3. 0 -10 -20 -30 10 20 30 40 50 60 oCoC Read the temperature on the thermometer as it changes. 20 0 C

4. 0 -10 -20 -30 10 20 30 40 50 60 oCoC Read the temperature on the thermometer as it changes. -10 0 C

5. Difference What is the difference in temperature between the two thermometers? 40 degrees 0 -10 -20 -30 10 20 30 40 50 60 oCoC 0 -10 -20 -30 10 20 30 40 50 60 oCoC

6. Menu Put the following in order of size from smallest to biggest : 1)5 °C, 3 °C, -5 °C, 0 °C, -8 °C 2)-34 m, 12m, -15m, 1m, -3m 3)2.5, -0.5, -1, 4, -2, -1.5, 0 -8°C, -5°C, 0°C, 3°C, 5°C -34m, -15m, -3m, 1m, 12m -2, -1.5, -1, -0.5, 0, 2.5, 4 Answers

7. Negative Numbers L.O:- To be able to add and subtract positive and negative numbers. Key Words Negative Whole number Addition Subtraction Integer

8. Number Line Negative Numbers on the Number Line 01 234 5 6 7 8 9 10 -2 -3 -4 -5 -6 -7 -8 -9 -10 Negative numbers are useful for representing quantities that can have values below zero. Examples include temperature, debt and heights below sea level. The part of the number line that consists of the positive and negative whole numbers, together with zero, are called the integers. To add numbers on a number line simply count to the right. 01 234 5 6 7 8 9 10 -2 -3 -4 -5 -6 -7 -8 -9 -10 ADD + Subtract - To subtract numbers on a number line simply count to the left.

9. 01 234 5 6 7 8 9 10 -2 -3 -4 -5 -6 -7 -8 -9 -10 Adding + 2 + 5 = 7 01 234 5 6 7 8 9 10 -2 -3 -4 -5 -6 -7 -8 -9 -10 0 + 6 =6 01 234 5 6 7 8 9 10 -2 -3 -4 -5 -6 -7 -8 -9 -10 -3 + 7 =4 01 234 5 6 7 8 9 10 -2 -3 -4 -5 -6 -7 -8 -9 -10 -5 + 5 =0 01 234 5 6 7 8 9 10 -2 -3 -4 -5 -6 -7 -8 -9 -10 - 4 + 7 =3 Negative Numbers on the Number Line

10. 2 - 1 + 3 =1- 4 + 5 =2- 6 + 9 =3- 7 + 12 =4- 6 + 10 =5- 8 + 8 =6- 9 + 6 =7- 5 + 4 =8- 10 + 20 =9- 15 + 8 =10 1 3 5 4 0 -3 10 -7 01 234 5 6 7 8 9 10 -2 -3 -4 -5 -6 -7 -8 -9 -10 Adding + You may use the number line if you wish, to answer the following: Negative Numbers on the Number Line

11. 1)5 – 72)3 – 5 3)1 – 4 4)2 – 6 5)5 – 10 6)-1 – 2 7)-2 – 3 8)-3 – 1 9)0 – 3 10)-2 + 511)-1 + 612)-5 + 7 13)-4 + 7 14)-4 + 415)-3 + 8 16)-5 + 217)-3 + 118)-2 + 2 19)12 – 2020)-15 – 1021)-8 + 20 22)-14 + 723)-30 – 2024)15 – 20 25)12 – 20 + 1026)-10 + 4 – 10 27)-1 + 2 – 3 + 4 – 5 + 6 – 7 + 8 – 9 + 10 Work out the following : - 2 - 3 - 4 - 5 - 3 - 5- 4- 3 3 5 2 3 0 5 - 20 - 8- 25 12 - 7 - 50 - 5 2- 16 5 Menu Answers

12. We can use a number line to help us add positive and negative integers. To add a negative integer we move backwards down the number line. –3 + –4 = = –7 -3-7 –3 + –4is the same as–3 – 4 Adding integers

13. Menu + + = + - - = + + - = - - + = - - 5 - 4 - 3 - 2 - 1 0 1 2 3 4 5 - + 1 + - 2= -1 Start Direction to move Move -

14. Menu + + = + - - = + + - = - - + = - - 5 - 4 - 3 - 2 - 1 0 1 2 3 4 5 - + -2 - - 3= 1 Start Direction to move Move +

15. Menu + + = + - - = + + - = - - + = - - 5 - 4 - 3 - 2 - 1 0 1 2 3 4 5 - + -1 - + 3= -4 Start Direction to move Move -

16. Menu + + = + - - = + + - = - - + = - - 5 - 4 - 3 - 2 - 1 0 1 2 3 4 5 - + 4 + - 3= 1 Start Direction to move Move -

17. Menu + + = + - - = + + - = - - + = - - 5 - 4 - 3 - 2 - 1 0 1 2 3 4 5 - + -3 + + 8= 5 Start Direction to move Move +

18. Menu + + = + - - = + + - = - - + = - - 5 - 4 - 3 - 2 - 1 0 1 2 3 4 5 - + 0 - - 4= 4 Start Direction to move Move +

19. 01 234 5 6 7 8 9 10 -2 -3 -4 -5 -6 -7 -8 -9 -10 Subtracting - You may use the number line if you wish, to answer the following: 4 7+ - 3 =14 -- 4 =2-3 - 5 =31 - +8 =40 -- 6 =5- 1 +- 1 =6- 2+ - 3 =7- 5 -- 3 =8- 7 -+ 3 =9- 3 -- 12 =10 8 - 8 - 7 6 -2 -5 -2 -10 9 Negative Numbers on the Number Line

20. Work out the following : Menu 1)5 + -22)3 - -33)-5 + -1 4)-6 - +35)8 + +46)9 - -9 7)0 + -78)-8 - -109)6 - +6 10)6 - -7 + -311)6 + 5 - -112)-2 - 5 - -1 13)0 - - 4 - - 4 + 414)-1 - 1 - - 1- -1 3 6 -6 -91218 -7 2 0 1012-6 120 Answers