1

1. Add and Subtract
Created by Richard Bull

2. Split the numbers up!
The art of this is to split the numbers up into
units, tens, hundreds etc.
Add each “bit” separately then join them
together at the end.
If you are asked to find the “sum” of some
numbers, add them.

3. An example of this:
Calculate 34 + 55
Split it up into tens and units:
Tens: 30 + 50 = 80
Units: 4 + 5 = 9
Final answer: 89

4. Another example of this:
Calculate 187 + 264
Split it up into tens and units:
Hundreds: 100 + 200 = 300
Tens: 80 + 60 = 140
Units: 7 + 4 = 11
Final answer: 451

5. Try these:
1. 26 + 53
2. 57 + 35
3. 98 + 57
4. 365 + 478
= 79
= 843
= 155
= 92

6. This is partitioning and using a column
method.
Try that method for these........
23 + 41 = 45 + 36 =

7. Now we are going to add things up in columns
T U
=1 2 6 4
67
+

8. Now we are going to add things up in columns
T U
= 2 7
5 4
18
+
1

9. Now we are going to add things up in columns
T U
= 4 8
3 8
68
+
1

10. Column subtraction - borrowing
52 - 25
5 2
2 5-
1
72
4
When the bottom digit in a column is greater
than the top number we need to ‘borrow’
© www.SaveTeachersSundays.com 2013

11. Decimals

12. £3 . 2 2
£5.7 1+
197£3 .

13. The golden rule:
•The decimal points MUST be
aligned before adding the
numbers.
LO: To be able to add and subtract decimals using the column method
CO: To be able to create a set of instructions and questions for somebody who hasn’t
worked with decimals before

14. £3.22
£5.71+
39£8. Created by Richard Bull