powerpoint a1 l2 use effective written methods to add whole numbers

PowerPoint A1 L2

Use effective written methods to

add whole numbers.

Written Method – Addition

57 + 76 =

We can work out the answer to this sum using column addition.

57

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

+ 76 + 76

1

57

3+ 76

1

57

133

Let’s have a go at another one.

69 + 58 =

69

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

+ 58 + 58

1

69

7+ 58

1

69

127

Let’s have a go at another one.

37 + 85 =

37

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

+ 85 + 85

1

37

2+ 85

1

37

122