1. Use effective written methods to add whole numbers.
PowerPoint A1 L2
Use effective written methods to add whole numbers.

2. Written Method – Addition=
We can work out the answer to this sum using column addition.

3. Position your digits carefully ensuring that the tens are over the tens and the units are over the units.
Now we add up the units. If they total 10 or more we need to carry any tens over into the tens column.
Now we add up the tens. Remember to add on any tens that have been carried over from the units 57
+ 76 1 57 3
+ 76 1 57
133
+ 76

4. Let’s have a go at another one.

5. =

6. Position your digits carefully ensuring that the tens are over the tens and the units are over the units.
Now we add up the units. If they total 10 or more we need to carry any tens over into the tens column.
Now we add up the tens. Remember to add on any tens that have been carried over from the units 69
+ 58 1 69 7
+ 58 1 69
127
+ 58

7. Let’s have a go at another one.

8. =

9. Position your digits carefully ensuring that the tens are over the tens and the units are over the units.
Now we add up the units. If they total 10 or more we need to carry any tens over into the tens column.
Now we add up the tens. Remember to add on any tens that have been carried over from the units 37
+ 85 1 37 2
+ 85 1 37
122
+ 85