www mathsrevision com Integers Add Subtract Integers Double
www. mathsrevision. com Integers Add / Subtract Integers Double Negatives Multiply +ve / -ve Integers Divide by +ve or -ve Integers 12/2/2020 Created by Mr. Lafferty Maths Dept.
www. mathsrevision. com Starter Questions 12/2/2020 Created by Mr. Lafferty Maths Dept.
Integers www. mathsrevision. com Addition & Subtraction Learning Intention 1. 12/2/2020 To understand how to add positive and negative numbers using thermometer as an aid. Success Criteria 1. To be able to do add and subtract both positive and negative integers. Created by Mr. Lafferty Maths Dept.
Integers Addition & Subtraction 4 www. mathsrevision. com 3 2 1+3= 4 4 - 5 = -1 1 Think Thermometer -1 -3 + 5 = 2 -2 -3 -1 - 2 = -3 12/2/2020 0 Created by Mr. Lafferty Maths Dept.
www. mathsrevision. com Integers Now try Exercise 3 Ch 2 (page 14) 12/2/2020 Created by Mr. Lafferty Maths Dept.
www. mathsrevision. com Starter Questions 12/2/2020 Created by Mr. Lafferty Maths Dept.
Integers www. mathsrevision. com Addition & Subtraction Learning Intention 1. To explain the ‘double negative’ for integers. Success Criteria 1. To understand the ‘double negative’ for integers. 2. To simplify and solve problems using the ‘double negative’ property. 12/2/2020 Created by Mr. Lafferty Maths Dept.
Integers www. mathsrevision. com Addition & Subtraction Double Negative 1 - (- 2) = 1 + 2 = 3 - 4 – (- 5) = - 4 + 5 = 1 -3 - (- 5) = - 3 + 5 = 2 Rule When side by side -- =+ “Two negatives make a positive” -1 - (- 10) = -1 + 10 = 9 12/2/2020 Created by Mr. Lafferty Maths Dept.
Integers www. mathsrevision. com Addition & Subtraction Now try Exercise 4 Ch 2 (page 15) 12/2/2020 Created by Mr. Lafferty Maths Dept.
www. mathsrevision. com Starter Questions 12/2/2020 Created by Mr. Lafferty Maths Dept.
Integers www. mathsrevision. com Multiplication & Division Learning Intention 1. Explain how to multiply positive and negative integers. 12/2/2020 Success Criteria 1. Understand how to multiply positive and negative integers. Created by Mr. Lafferty Maths Dept.
Integers www. mathsrevision. com Multiplication & Division Rule Multiplying Integers 1 x (-2) = (-2) ÷ 1 = -2 Multiplying / Dividing (-4) x 5 = -20 (- 20) ÷ 5 = -4 (-3) x 3 = -9 5 x (-8) = -40 12/2/2020 +ve x -ve = -ve +ve ÷ -ve = -ve 15 ÷ (-5) =-3 “A positive x a negative 40 ÷ (-8) = -5 gives a negative answer” “A positive ÷ a negative gives a negative answer” Created by Mr. Lafferty Maths Dept.
Integers www. mathsrevision. com Multiplication & Division Now try Exercise 5 Ch 2 (page 17) Q 1 – Q 6 12/2/2020 Created by Mr. Lafferty Maths Dept.
www. mathsrevision. com Starter Questions 12/2/2020 Created by Mr. Lafferty Maths Dept.
Integers www. mathsrevision. com Multiplication & Division Learning Intention 1. To explain the double negative for multiplying and division. Success Criteria 1. Understand the ‘double negative’ for multiplying and dividing negative numbers. 2. Use double negative to solve problems. 12/2/2020 Created by Mr. Lafferty Maths Dept.
Integers www. mathsrevision. com Multiplication & Division Rule (-2) x (-1) = 2 (-2) ÷ (-1) = 2 Multiplying / Dividing (-4) x (-5) = 20 (- 20) ÷(-5) = 4 (-3) x (-3) = 9 (-9) ÷ (-3) =3 -ve x -ve = +ve -ve ÷ -ve = +ve “A negative x a negative (-5) x (-8) = 40 (-40) ÷ (-8) =5 gives a positive answer” “A negative ÷ a negative gives a positive answer” 12/2/2020 Created by Mr. Lafferty Maths Dept.
Integers www. mathsrevision. com Multiplication & Division Now try Exercise 5 Ch 2 (page 18) Q 7 – Q 10 12/2/2020 Created by Mr. Lafferty Maths Dept.
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