LO To solve problems using negative numbers See

LO: To solve problems using negative numbers

See what you can remember from yesterday! Varied Fluency 1 Put the temperatures in order from warmest to coolest. A 0 o. C 10 o. C -4 o. C 6 o. C -8 o. C 2 o. C -12 o. C -16 o. C -20 o. C -10 o. C B 65 o. C 45 o. C 25 o. C -15 o. C C

Varied Fluency 1 Put the temperatures in order from warmest to coolest. 65 o. C 45 o. C 25 o. C -15 o. C 0 o. C 10 o. C -4 o. C 6 o. C -8 o. C 2 o. C -12 o. C -16 o. C -20 o. C -10 o. C C A B 35°C -2°C -4°C

Varied Fluency 2 Label -2 on the number line. -5 -3 -1 1 3

Varied Fluency 2 Label -2 on the number line. -5 -3 -2 -1 1 3

Varied Fluency 3 What is the temperature on thermometer? -4 o. C -8 o. C -12 o. C -16 o. C -20 o. C -24 o. C

Varied Fluency 3 What is the temperature on thermometer? -4 o. C -8 o. C -12 o. C -16 o. C -20 o. C -24 o. C -18 o. C

Varied Fluency 4 Which iceberg is deeper? m m 2 0 0 -2 -4 -10 -6 A B

Varied Fluency 4 Which iceberg is deeper? m m 2 0 0 -2 -4 -10 -6 A B -6 m -15 m

In today’s lesson you are going to be using your knowledge of negative numbers from yesterday to help you solve some problems. For example: Start from 4 and count down 7 steps. What number do you end up with? -3 Here you need to use your answer from a) and count on/up thermometer from that a) answer to 13. How many steps have you made? 10 Remember you can download this thermometer and negative numberline form the Year 5 web page.

Now try these! Problem Solving 1 What’s my number? My number is between 10 and 5. It is an odd number. It is a negative number. It is closer to zero than it is to 5. Use the number line to help you. -5 10

Problem Solving 1 What’s my number? My number is between 10 and 5. It is an odd number. It is a negative number. It is closer to zero than it is to 5. Use the number line to help you. -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10

Reasoning 1 Three children are counting in sequences using number lines. Anna -20 -10 Pete Dot -15 -12 -5 0 10 -8 5 10 30 -6 Are they correct? Explain how you know. -4 15 50 -2 0

Reasoning 1 Three children are counting in sequences using number lines. Anna -20 -10 Pete Dot -15 -12 -5 0 10 -8 5 10 30 -6 Are they correct? Explain how you know. Dot is incorrect because… -4 15 50 -2 0

Reasoning 1 Three children are counting in sequences using number lines. Anna -20 -10 Pete Dot -15 -12 -5 0 10 -8 5 10 30 -6 -4 15 50 -2 0 Are they correct? Explain how you know. Dot is incorrect because she did not count back two from -15.

Reasoning 2 Which city is cooler? Explain how you know. 17 o. C 4 o C 13 o. C 0 o C 9 o C -4 o. C 5 o C -8 o. C 1 o C -12 o. C -3 o. C Glasgow Aspen

Reasoning 2 Which city is cooler? Explain how you know. 17 o. C 4 o C 13 o. C 0 o C 9 o C -4 o. C 5 o C -8 o. C 1 o C -12 o. C -3 o. C Glasgow Aspen is cooler because… Aspen

Reasoning 2 Which city is cooler? Explain how you know. 17 o. C 13 o. C 9 o C 5 o C 1 o C -3 o. C Glasgow = 3 o. C 4 o C 0 o C -4 o. C -8 o. C -12 o. C Aspen = -2 o. C Aspen is cooler because -2 o. C is less than 3 o. C.

Remember to think about which information is really KEY to you solving the problem. Underline it!! Y cou ou nee bet nt th d to ej we 3 t en 14 umps og and i ans ve the wer 17 m Rosie = 3 metres below ground (in this case below 0) 0 is the Ground Floor Teddy = 14 metres above ground (in this case above 0)

Independent Activities Now it’s your turn. Task 1 – download from the website or use paper at home. Remember you can download a negative number line or thermometer from the Class 5 Web Page.

Independent Activities Now it’s your turn. Task 2 – download from the website or complete on paper at home. Remember you can download a negative number line or thermometer from the Class 5 Web Page.

Independent Activities Now it’s your turn. Task 2 – download from the website or complete on paper at home. Remember you can download a negative number line or thermometer from the Class 5 Web Page.

Extension Work Task 3 – download from the website or complete on paper. Remember you can download a negative number line or thermometer from the Class 5 Web Page.

Extension Work Task 3 – download from the website or complete on paper at home. Remember you can download a negative number line or thermometer from the Class 5 Web Page.

Answers for Task 1

Answers for Task 2

Answers for Task 3 (Extension Tasks)