1. Put todays date next to these learning objectives
2. Add and Subtract Negative Numbers 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 a
Reference material
Text book: section 8.1
MEP: Area

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

3. 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 = 12
Face
+ve
Walk
Forward 9
Start
here

4. 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 = -7
Face
+ve
Walk
backwards 10
Start
here

5. 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 = 3
Face
+ve
Walk
Forward 15
Start
here

6. 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 = -13
Face
+ve
Walk
backwards 10
Start
here

7. Take a breath
25 July 2019

8. 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 = -8
Face
-ve
Walk
forward 15
Start
here

9. 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 = 14
Face
-ve
Walk
backwards 12
Start
here

10. 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 = -15
Face
-ve
Walk
forwards 13
Start
here

11. 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 = 14
Face
-ve
Walk
backwards 21
Start
here

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