# Created by Mr. Lafferty Maths Dept

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Created by Mr. Lafferty Maths Dept
Negative Numbers Integers – Positive and Negative Add /Sub using Thermometer Add / Sub Mathematically Negative Coordinate Grid 5-Apr-17 Created by Mr. Lafferty Maths Dept

Created 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. 5-Apr-17 Created by Mr. Lafferty Maths Dept

Created by Mr. Lafferty Maths Dept
Negative Numbers Addition & Subtraction Learning Intention Success Criteria 1 We are learning how to add positive and negative numbers. Understand how to add and subtract both positive and negative integers using a thermometer. 5-Apr-17 Created by Mr. Lafferty Maths Dept

Created 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 Write down 3 places where negative numbers are used Interpreting negative numbers Ex1 Page 59 Round Class 5-Apr-17 Created by Mr. Lafferty Maths Dept

Created by Mr. Lafferty Maths Dept
Negative Numbers 24 22 20 14 18 16 12 10 UP + (a) 4oC up from 12 o C 8 = 16 6 4 (b) 8oC down from 10 o C 2 = 2 -2 Down - (c) 3oC up from -2 o C -4 = 1 -6 -8 (d) 6oC down from 2 o C -24 -22 -20 -14 -18 -16 -12 -10 2 - 6 = -4 5-Apr-17 Created by Mr. Lafferty Maths Dept

Created by Mr. Lafferty Maths Dept
Negative Numbers Your turn ! Page 61 Exercise 2 5-Apr-17 Created by Mr. Lafferty Maths Dept

Created 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. 5-Apr-17 Created by Mr. Lafferty Maths Dept

Created by Mr. Lafferty Maths Dept
Negative Numbers Addition & Subtraction Learning Intention Success Criteria 1 We are learning how to write down mathematically addition and subtraction of negative integers. To be able to write down mathematically the addition and subtraction of both positive and negative integers. 5-Apr-17 Created by Mr. Lafferty Maths Dept

Created by Mr. Lafferty Maths Dept
Negative Numbers 24 22 20 14 18 16 12 10 UP + (a) = 16 8 6 4 Go up 4 Start at 12 2 -2 Down - (b) 10 +(-8) = 2 -4 -6 -8 Start at 10 Go down 8 -24 -22 -20 -14 -18 -16 -12 -10 (c) = -3 Start at 7 Go down 10 5-Apr-17 Created by Mr. Lafferty Maths Dept

Created by Mr. Lafferty Maths Dept
Negative Numbers Examples Remember “+ -” = - “- +” = - (1) = -4 (2) 4 + (-9) = -5 (3) = -15 (4) (-12) = -14 (5) = -30 (6) 8 + (-9) = -1 5-Apr-17 Created by Mr. Lafferty Maths Dept

Created by Mr. Lafferty Maths Dept
Negative Numbers Your turn ! Page 61 Exercise 2 Q1 and Q2 5-Apr-17 Created by Mr. Lafferty Maths Dept

Created by Mr. Lafferty Maths Dept
Starter Questions 5-Apr-17 Created by Mr. Lafferty Maths Dept

Created by Mr. Lafferty Maths Dept
Coordinates Extending the Grid – Negative Numbers Learning Intention Success Criteria Remember the main parts of a coordinate grid. 1. We are learning how we can extend the coordinate grid to include negative numbers. 2. Understand the negative grid both in y-axis direction and x-axis direction. 5-Apr-17 Created by Mr. Lafferty Maths Dept

Coordinates www.mathsrevision.com
Extending the Grid – Negative Numbers We can further extend the negative grid y - axis Plot the point (-2,2) 3 x-coordinate is -2 2 1 y-coordinate is 2 -4 -3 -2 -1 1 2 3 4 x - axis -1 (-4,-2) -2 -3 x-coordinate is -4 y-coordinate is -2 Write down coordinates of the other points 5-Apr-17 Created by Mr. Lafferty Maths Dept

Created by Mr. Lafferty Maths Dept
Coordinates Extending the Grid Now try Exercise 4 Ch5 (page 64) 5-Apr-17 Created by Mr. Lafferty Maths Dept

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