1. Lesson Objectives By the end of the lesson, I will be able to….. -order directed numbers (Level 4)(Grade F) -add and subtract negative numbers in context (Level 5)(Grade E) Key Words London 13  C Montreal -11  C If I travel instantly from London to Madrid: Does the temperature rise or fall? By how much? Madrid to Moscow? Moscow to Montreal? Cairo is 30° warmer than Montreal. What is the temperature in Cairo? Madrid 20  C Moscow -8  C Directed numbers Negative Positive

2. Lesson Objectives By the end of the lesson, I will be able to….. -order directed numbers (Level 4) -add and subtract negative numbers in context (Level 5) Key Words Directed numbers Negative Positive Final temperature missing Verkhoyansk Verkhoyansk Wellington to Wellington –40 °C +55 °C ? Starting temperature + change = final temperature: –40 + (+55) = +15 Lesson Objectives By the end of the lesson, I will be able to….. -order directed numbers (Level 4)(Grade F) -add and subtract negative numbers in context (Level 5)(Grade E)

3. Lesson Objectives By the end of the lesson, I will be able to….. -order directed numbers (Level 4) -add and subtract negative numbers in context (Level 5) Key Words Directed numbers Negative Positive Starting temperature missing Khartoum Khartoum to Sydney Sydney ? –10 °C +25 °C Final temperature – change = starting temperature: +25 – (–10) = +35 Lesson Objectives By the end of the lesson, I will be able to….. -order directed numbers (Level 4)(Grade F) -add and subtract negative numbers in context (Level 5)(Grade E)

4. Lesson Objectives By the end of the lesson, I will be able to….. -order directed numbers (Level 4) -add and subtract negative numbers in context (Level 5) Key Words Directed numbers Negative Positive Change missing temperature Sydney Sydney to Verkhoyansk Verkhoyansk 25 °C ? –40 °C Final temperature – initial temperature = change in temperature: –40 – (+25) = – 65 Lesson Objectives By the end of the lesson, I will be able to….. -order directed numbers (Level 4)(Grade F) -add and subtract negative numbers in context (Level 5)(Grade E)

5. Lesson Objectives By the end of the lesson, I will be able to….. -order directed numbers (Level 4) -add and subtract negative numbers in context (Level 5) Key Words Directed numbers Negative Positive Combining changes Khartoum Sydney Khartoum to Sydney to Moscow to Moscow –10 °C –35 °C ? First change + second change = combined change: –10 + (–35) = –45 Lesson Objectives By the end of the lesson, I will be able to….. -order directed numbers (Level 4)(Grade F) -add and subtract negative numbers in context (Level 5)(Grade E)

6. Lesson Objectives By the end of the lesson, I will be able to….. -order directed numbers (Level 4) -add and subtract negative numbers in context (Level 5) Key Words Directed numbers Negative Positive Level 5 question Lesson Objectives By the end of the lesson, I will be able to….. -order directed numbers (Level 4)(Grade F) -add and subtract negative numbers in context (Level 5)(Grade E)

7. Lesson Objectives By the end of the lesson, I will be able to….. -order directed numbers (Level 4) -add and subtract negative numbers in context (Level 5) Key Words Directed numbers Negative Positive Grade F question The table gives information about the midday temperatures in four cities on one day in December. (a)How many degrees higher was the temperature in Washington than the temperature in Toronto?.................. °C (2 marks) (b)Work out the difference in temperature between Moscow and Toronto................... °C (1 mark) (c)For which two cities was there the greatest difference in temperature? (2 marks) Lesson Objectives By the end of the lesson, I will be able to….. -order directed numbers (Level 4)(Grade F) -add and subtract negative numbers in context (Level 5)(Grade E)