Addition and subtraction

In this lesson, we will investigate different mental strategies to add and subtract, including regrouping.

In this lesson, we will use known number facts in order to mentally add multiples of 10 to 3-digit numbers. We will look at partitioning strategies and analyse place value to make mental addition more efficient.

In this lesson, we will use known number facts in order to mentally subtract multiples of 10 from 3-digit numbers. We will look at partitioning strategies and analyse place value to make mental subtraction more efficient.

In this lesson, we will use known number facts in order to mentally add and subtract multiples of 100 to and from 3-digit numbers. We will look at partitioning strategies and analyse place value to make mental addition and subtraction more efficient.

In this lesson, we will learn to partition 3-digit numbers in order to mentally add them accurately.

In this lesson, we will learn to partition 3-digit numbers in order to mentally subtract them accurately.

In this lesson, we will build on our knowledge of the 10 times table in order to estimate by rounding. We will do this to answer addition questions.

In this lesson, we will build on our knowledge of the 10 times table in order to estimate by rounding. We will do this to answer subtraction questions.

In this lesson, we will build on our knowledge of partitioning and estimating and introduce column addition.

In this lesson, we will look at using column addition when a number requires regrouping in more than one column when adding.

In this lesson, we will build on our knowledge of column addition and introduce regrouping for column subtraction.

In this lesson, we will focus on column subtraction where regrouping from the hundreds into the tens column is needed.

In this lesson, we will consolidate learning on column subtraction and will practise regrouping across all columns

In this lesson, we will consolidate learning on column addition and subtraction by applying this knowledge to word problems.

In this lesson, we will answer addition and subtraction word problems which require us to identify the unknown quantity.