Addition and subtraction within 20

In this lesson, we will practise adding 2 quantities together by counting them all.

In this lesson, we will add 2 quantities together by adding on. We will remember the initial amount and counting on from that to add on the next amount.

In this lesson, we will start learning about subtraction. We will look at the part-whole model and think about subtraction as partitioning, taking away a part of the whole and finding out how many are left.

In this lesson, we will continue learning about subtraction. We will think about subtraction as taking away and we will make up subtraction stories.

In this lesson, we will revise more and fewer by comparing groups of objects and deciding which group has more and which group has fewer.

In this lesson, we will compare quantities using the words 'more' and 'fewer.' We will solve a problem listening to clues to work out how many passengers are in each carriage of the train.

In this lesson, we will learn how to double with concrete objects and pictures. Then we will use a part-whole model to show doubling.

In this lesson, we will explore halving.

In this lesson, we will estimate the amount of items in a pot and count to check how many are actually there. We will see how close our estimation is to the actual amount.

In this lesson, we will recap addition and subtraction.