Put todays date next to these learning objectives

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Presentation transcript:

Put todays date next to these learning objectives 2. Add and Subtract Negative Numbers 25 July 2019 Put todays date next to these learning objectives Add and subtract positive integers to/from negative integers 5c Add and subtract negative integers to/from positive and negative integers 5a Reference material Text book: section 8.1 MEP: Area

All you need to remember is: Positive numbers walk forward Negative numbers walk backwards

Bert the dinosaur adds 2 positive numbers lets try 3 + 9 = 12 +ve -ve -16 -14 -12 -10 -8 -6 -4 -2 2 4 6 8 10 12 14 I will be leaving the + sign off the positive numbers for ease lets try 3 + 9 = 12 Face +ve Walk Forward 9 Start here

Bert the dinosaur adds a negative number to a positive number -16 -14 -12 -10 -8 -6 -4 -2 2 4 6 8 10 12 14 I will be leaving the + sign off the positive numbers for ease lets try 3 + -10 = -7 Face +ve Walk backwards 10 Start here

Bert the dinosaur adds a positive number to a negative number -16 -14 -12 -10 -8 -6 -4 -2 2 4 6 8 10 12 14 I will be leaving the + sign off the positive numbers for ease lets try -12 + 15 = 3 Face +ve Walk Forward 15 Start here

Bert the dinosaur adds 2 negative numbers lets try -3 + -10 = -13 +ve -16 -14 -12 -10 -8 -6 -4 -2 2 4 6 8 10 12 14 I will be leaving the + sign off the positive numbers for ease lets try -3 + -10 = -13 Face +ve Walk backwards 10 Start here

Take a breath 25 July 2019

Bert the dinosaur subtracts 2 positive numbers +ve -ve -16 -14 -12 -10 -8 -6 -4 -2 2 4 6 8 10 12 14 I will be leaving the + sign off the positive numbers for ease lets try 7 - 15 = -8 Face -ve Walk forward 15 Start here

Bert the dinosaur subtracts a negative number +ve -ve -16 -14 -12 -10 -8 -6 -4 -2 2 4 6 8 10 12 14 I will be leaving the + sign off the positive numbers for ease lets try 2 - -12= 14 Face -ve Walk backwards 12 Start here

Bert the dinosaur subtracts a positive number +ve -ve -16 -14 -12 -10 -8 -6 -4 -2 2 4 6 8 10 12 14 I will be leaving the + sign off the positive numbers for ease lets try -2 - 13 = -15 Face -ve Walk forwards 13 Start here

Bert the dinosaur subtracts a negative number +ve -ve -16 -14 -12 -10 -8 -6 -4 -2 2 4 6 8 10 12 14 I will be leaving the + sign off the positive numbers for ease lets try -7 - -21 = 14 Face -ve Walk backwards 21 Start here

Did you spot? 12 - -2 = 12 + 2 = 14 12 - - 3 = 12 + 3 = 15 12 - - 4 = 12 + 4 = 16 25 July 2019