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MNU 2-04a MNU 3-04a 25-Aug-14Created by Mr. Lafferty Maths Dept Negative Numbers Integers – Positive and Negative Add /Sub using Thermometer www.mathsrevision.com.

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Presentation on theme: "MNU 2-04a MNU 3-04a 25-Aug-14Created by Mr. Lafferty Maths Dept Negative Numbers Integers – Positive and Negative Add /Sub using Thermometer www.mathsrevision.com."— Presentation transcript:

1 MNU 2-04a MNU 3-04a 25-Aug-14Created by Mr. Lafferty Maths Dept Negative Numbers Integers – Positive and Negative Add /Sub using Thermometer Add / Sub Mathematically Negative Coordinate Grid

2 MNU 2-04a MNU 3-04a 25-Aug-14Created by Mr. Lafferty Maths Dept Starter Questions 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 2-04a MNU 3-04a 25-Aug-14Created by Mr. Lafferty Maths Dept Learning Intention Success Criteria 1.Understand how to add and subtract both positive and negative integers using a thermometer. 1 We are learning how to add positive and negative numbers. Negative Numbers Addition & Subtraction

4 MNU 2-04a MNU 3-04a 25-Aug-14Created by Mr. Lafferty Maths Dept 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 Ex1 Page 59 Round Class Interpreting negative numbers Write down 3 places where negative numbers are used

5 MNU 2-04a MNU 3-04a 25-Aug-14Created by Mr. Lafferty Maths Dept Negative Numbers (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 = = = = -4

6 MNU 2-04a MNU 3-04a 25-Aug-14Created by Mr. Lafferty Maths Dept Your turn ! Page 61 Exercise 2 Negative Numbers

7 MNU 2-04a MNU 3-04a 25-Aug-14Created by Mr. Lafferty Maths Dept Starter Questions 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.

8 MNU 2-04a MNU 3-04a 25-Aug-14Created by Mr. Lafferty Maths Dept Learning Intention Success Criteria 1.To be able to write down mathematically the addition and subtraction of both positive and negative integers. 1 We are learning how to write down mathematically addition and subtraction of negative integers. Negative Numbers Addition & Subtraction

9 MNU 2-04a MNU 3-04a 25-Aug-14Created by Mr. Lafferty Maths Dept Negative Numbers (a) = (b)10 +(-8) = (c) = Down -UP Start at 12 Go up 4 Start at 10 Go down 8 Start at 7 Go down 10

10 MNU 2-04a MNU 3-04a 25-Aug-14Created by Mr. Lafferty Maths Dept = -4 (1) (2) 4 + (-9) (3) (4) -2 + (-12) (5) (6) 8 + (-9) Examples = -5 = -15 = -14 = -30 = -1 Negative Numbers Remember “+ -” = - “- +” = -

11 MNU 2-04a MNU 3-04a 25-Aug-14Created by Mr. Lafferty Maths Dept Your turn ! Page 61 Exercise 2 Q1 and Q2 Negative Numbers

12 MNU 2-04a MNU 3-04a 25-Aug-14Created by Mr. Lafferty Maths Dept Starter Questions Starter Questions

13 MNU 2-04a MNU 3-04a 25-Aug-14Created by Mr. Lafferty Maths Dept Learning Intention Success Criteria 1. We are learning how we can extend the coordinate grid to include negative numbers. 1.Remember the main parts of a coordinate grid. Coordinates 2. Understand the negative grid both in y-axis direction and x-axis direction. Extending the Grid – Negative Numbers

14 MNU 2-04a MNU 3-04a 25-Aug-14Created by Mr. Lafferty Maths Dept Coordinates We can further extend the negative grid Plot the point (-2,2) (-4,-2) x - axis y - axis x-coordinate is -2 y-coordinate is 2 x-coordinate is -4 y-coordinate is Write down coordinates of the other points Extending the Grid – Negative Numbers

15 MNU 2-04a MNU 3-04a 25-Aug-14Created by Mr. Lafferty Maths Dept Now try Exercise 4 Ch5 (page 64) Coordinates Extending the Grid


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