Year 3

## Lessons (15)

• In this lesson, we will investigate different mental strategies to add and subtract, including regrouping.
1 Slide deck
1 Worksheet
1 Quiz
1 Video
• 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.
1 Slide deck
1 Worksheet
2 Quizzes
1 Video
• 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.
1 Slide deck
1 Worksheet
2 Quizzes
1 Video
• 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.
1 Slide deck
1 Worksheet
2 Quizzes
1 Video
• In this lesson, we will learn to partition 3-digit numbers in order to mentally add them accurately.
1 Slide deck
1 Worksheet
2 Quizzes
1 Video
• In this lesson, we will learn to partition 3-digit numbers in order to mentally subtract them accurately.
1 Slide deck
1 Worksheet
2 Quizzes
1 Video
• 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.
1 Slide deck
1 Worksheet
2 Quizzes
1 Video
• 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.
1 Slide deck
1 Worksheet
2 Quizzes
1 Video
• In this lesson, we will build on our knowledge of partitioning and estimating and introduce column addition.
1 Slide deck
1 Worksheet
2 Quizzes
1 Video
• In this lesson, we will look at using column addition when a number requires regrouping in more than one column when adding.
1 Slide deck
1 Worksheet
2 Quizzes
1 Video
• In this lesson, we will build on our knowledge of column addition and introduce regrouping for column subtraction.
1 Slide deck
1 Worksheet
2 Quizzes
1 Video
• In this lesson, we will focus on column subtraction where regrouping from the hundreds into the tens column is needed.
1 Slide deck
1 Worksheet
2 Quizzes
1 Video
• In this lesson, we will consolidate learning on column subtraction and will practise regrouping across all columns
1 Slide deck
1 Worksheet
2 Quizzes
1 Video
• In this lesson, we will consolidate learning on column addition and subtraction by applying this knowledge to word problems.
1 Slide deck
1 Worksheet
2 Quizzes
1 Video
• In this lesson, we will answer addition and subtraction word problems which require us to identify the unknown quantity.
1 Slide deck
1 Worksheet
2 Quizzes
1 Video