Today we will be learning

more about addition and subtraction.

Mental Activity

We are going to practise counting on and back around the group.

When you see or hear “Change!” change direction.

Start on 97.

Count forwards in ones.

Change!

Change!

Change!

Change!

Start on 32.

Count forwards in tens.

Change!

Change!

Change!

Change!

Start on 55.

Count forwards in fives.

Change!

Change!

Change!

Change!

Practise mentally adding and subtracting quickly.

Say the answer to each sum in 5 seconds.

11 13+ = 24

18 9- = 9

5 ? 12+ =

7

17 ? 11- =

6

? 6 9- =

15

What do 6 and 4 make?

10

What do I add to 5 to make 12?

7

Main Activity

Today we are going to think about

how words tell us when

to add or subtract.

Think of words that mean the same as “add”.

+Do your ideas match any words on

the fox’s list?

sum

total

plusmore

increase

altogether

These words

mean the same as

“add”.

Think of words that mean the same as “subtract”.

-

We can check the fox’s list.

take

less

less thandifference between

decrease

difference

These words

mean the same as

“subtract”.

These words are often used in problems.

Example:

Aaron had 24 marbles.

Kelly had 8 more.

How many did Kelly have?

3224 + 8 =

Use one of these words to make up a problem of your own.

addition

sum

total

plus

altogether

more than

increase

subtraction

take away

difference

less

take from

less than

decrease

Group Work

Addition and subtraction activities using number cards