1. MNU 3-04a 25-Oct-15Created by Mr. Lafferty Maths Dept Integers Integers in Context Add /Sub using Thermometer www.mathsrevision.com Add / Sub Mathematically Multiplication & Division Double Negative

2. MNU 3-04a 25-Oct-15Created by Mr. Lafferty Maths Dept Starter Questions www.mathsrevision.com Q1.Calculate Q2.How many euros do I get for £20 if exchange rate is £1  1.5 € Q3.What is the time difference 09:28 and 10:50 Q4.The answer to the question is 90. What is the question.

3. MNU 3-04a 25-Oct-15Created by Mr. Lafferty Maths Dept www.mathsrevision.com Learning Intention Success Criteria 1.Understand how integers are used in real-life. 1 We are learning how to use integers in context. Integers

4. MNU 3-04a 25-Oct-15Created by Mr. Lafferty Maths Dept www.mathsrevision.com Integers Definition :An INTEGER is a negative or positive whole number, including 0. e.g.-2, -1, 0, 5, 100 Note : -2.5, -1.2, 23.5 Are NOT INTEGERS Write down 3 places where Integers are used Weather Bank Sea-Level Height

5. MNU 3-04a 25-Oct-15Created by Mr. Lafferty Maths Department Now try TJ3a Ex 1 Q1 – Q4 Class Discussion Ch4 (page 32) www.mathsrevision.com Integers

6. MNU 3-04a 25-Oct-15Created by Mr. Lafferty Maths Dept Negative Numbers www.mathsrevision.com 2 8 24 22 20 14 18 16 12 10 6 4 0 -2 -8 -24 -22 -20 -14 -18 -16 -12 -10 -6 -4 (a) 4 o C up from 12 o C (b) 8 o C down from 10 o C (c) 3 o C up from -2 o C (d) 6 o C down from 2 o C Down -UP + 12 + 4 = 16 10 - 8 = 2 -2 + 3 = 1 2 - 6 = -4

7. MNU 3-04a 25-Oct-15Created by Mr. Lafferty Maths Department Now try TJ3a Ex 1 Q5 Class Discussion Ch4 (page 32) www.mathsrevision.com Integers

8. MNU 3-04a 25-Oct-15Created by Mr. Lafferty Maths Dept Starter Questions www.mathsrevision.com Q1.Calculate Q2.How many euros do I get for £10 if exchange rate is £1  1.4 € Q3.What is the time difference 09:45 and 20:30 Q4.The answer to the question is 30. What is the question.

9. MNU 3-04a 25-Oct-15Created by Mr. Lafferty Maths Dept www.mathsrevision.com Learning Intention Success Criteria 1.To be able to write down mathematically the addition and subtraction of integers. 1 We are learning how to write down mathematically addition and subtraction of integers. Integers Addition & Subtraction

10. MNU 3-04a 25-Oct-15Created by Mr. Lafferty Maths Dept Negative Numbers www.mathsrevision.com 2 8 24 22 20 14 18 16 12 10 6 4 0 -2 -8 -24 -22 -20 -14 -18 -16 -12 -10 -6 -4 (a)12 + 4 = (b)10 + (-8) = (c) 7 - 10 = Down -UP + 2 -3 16 Start at 12 Go up 4 Start at 10 Go down 8 Start at 7 Go down 10 Rule Adding a negative is the same as subtracting “+ -” = -

11. MNU 3-04a 25-Oct-15Created by Mr. Lafferty Maths Dept = -4 www.mathsrevision.com (1) 3 - 7 (2) 4 + (-9) (3) -7 - 8 (4) -2 + (-12) (5) -5 - 25 (6) (-8) + (-9) Examples = -5 = -15 = -14 = -30 = -17 Integers Remember Rule !

12. MNU 3-04a 25-Oct-15Created by Mr. Lafferty Maths Department Now try TJ3a Ex 2 Ch4 (page 35) www.mathsrevision.com Integers

13. 25-Oct-15Created by Mr. Lafferty Maths Dept. Starter Questions Starter Questions www.mathsrevision.com

14. MNU 3-04a 25-Oct-15Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Learning Intention Success Criteria 1.To understand the ‘double negative’ rule for integers. 1. We are learning the ‘double negative’ rule for integers. Integers 2.To be able to solve problems using the ‘double negative’ rule. Addition & Subtraction

15. MNU 3-04a 25-Oct-15Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Integers 1 - (- 2) = -1 - (- 10) = -3 - (- 5) = - 4 – (- 5) = 3 1 2 9 1 + 2 = - 4 + 5 = - 3 + 5 = -1 + 10 = Double Negative Rule Subtracting a negative is the same as adding “- -” = +

16. MNU 3-04a 25-Oct-15Created by Mr. Lafferty Maths Department Now try TJ3a Ex 3 Ch4 (page 36) www.mathsrevision.com Integers

17. 25-Oct-15Created by Mr. Lafferty Maths Dept. Starter Questions Starter Questions www.mathsrevision.com

18. 25-Oct-15Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Learning Intention Success Criteria 1. We are learning the rules for multiplying and dividing integers. 1. Understand the rules for multiplying and dividing integers. Integers 2. Apply rules to problems. Multiplication & Division

19. MNU 3-04a 25-Oct-15Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Integers (-2) x (-1) = 2 (-5) x (-8) = 40 (-3) x (-3) = 9 (-4) x (-5) = 20 (-2) ÷ (-1) = 2 (- 20) ÷(-5) = 4 (-9) ÷ (-3) = 3 (-40) ÷ (-8) = 5 Multiplication & Division Rule Same Signs = POSITIVE answer

20. MNU 3-04a Multiplication & Division 25-Oct-15Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Integers 1 x (-2) = (-2) 5 x (-8) = -40 (-3) x 3 = -9 (-4) x 5 = -20 (-2) ÷ 1 = -2 (- 20) ÷ 5 = -4 15 ÷ (-5) = -3 40 ÷ (-8) = -5 Rule Different Signs = NEGATIVE answer

21. MNU 3-04a 25-Oct-15Created by Mr. Lafferty Maths Dept = -21 www.mathsrevision.com (1) (-3) x 7 (2) 54 ÷ (-9) (3) (-4) x (-8) (4) (-12) ÷ (-2) (5) -5 x (25 – 30) (6) ((-8) x 6) ÷ 3 Examples = -6 = 32 = 6 = 25 = -16 Integers

22. MNU 3-04a 25-Oct-15Created by Mr. Lafferty Maths Department Now try TJ3a Ex 4 Ch4 (page 37) www.mathsrevision.com Integers

23. MNU 3-04a 25-Oct-15Created by Mr. Lafferty Maths Department Now try TJ3a MIXED Q’s Ex 5 Ch4 (page 39) www.mathsrevision.com Integers