Year 3

# Number sense and exploring calculation strategies

## Lessons (15)

• In this lesson, we will link and apply known facts using number sense, and explore different visual representations of numbers and their properties.
1 Slide deck
1 Worksheet
1 Quiz
1 Video
• In this lesson, we will investigate and find new facts from number bonds. We will investigate the effect of adding and subtracting 1 to numbers in a calculation, and the effect of adjusting the place value of digits.
1 Slide deck
1 Worksheet
2 Quizzes
1 Video
• In this lesson, we will investigate the ways in which the names of numbers change as we make adjustments to the digits, and compare written numbers with their names.
1 Slide deck
1 Worksheet
2 Quizzes
1 Video
• In this lesson, we will investigate the place value of each digit in two digit numbers. We will look at visual representations of the value of each digit.
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1 Worksheet
2 Quizzes
1 Video
• In this lesson, we will introduce the greater than, and less than symbols > and <, and use them to accurately compare different numbers.
1 Slide deck
1 Worksheet
2 Quizzes
1 Video
• In this lesson, we will look at the properties of addition and subtraction, including the law of commutativity. We will revisit place value and consider addition and subtraction as inverse operations.
1 Slide deck
1 Worksheet
2 Quizzes
1 Video
• In this lesson, we will be using number bonds and looking for patterns for numbers within 20. We will look at partitioning and part whole modelling.
1 Slide deck
1 Worksheet
2 Quizzes
1 Video
• In this lesson, we will be adding and subtracting 2 digit numbers without regrouping by using our number bond knowledge and using visual representations of place value.
1 Slide deck
1 Worksheet
2 Quizzes
1 Video
• In this lesson, we will be adding and subtracting 2 digit numbers with regrouping by using our number bond knowledge. We will use number lines to visualise the process.
1 Slide deck
1 Worksheet
1 Quiz
1 Video
• In this lesson, we we will add and subtract 2 digit numbers by using the round and adjust strategy whereby numbers are rounded to the nearest five or ten, then adjusted again at the end of the calculation.
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1 Worksheet
1 Video
• In this lesson, we will use round and adjust strategies to subtract and add near doubles. We will partition two digit numbers in order to make calculations easier.
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1 Worksheet
1 Quiz
1 Video
• In this lesson, we will use an 'adding on' strategy to find the difference between two numbers. We will use real life shopping examples and look at model solutions.
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1 Worksheet
2 Quizzes
1 Video
• In this lesson, we will solve word problems using bar models as a visual tool to aid comparison between two values.
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1 Worksheet
2 Quizzes
1 Video
• In this lesson, we will solve word problems using bar models as a visual tool to aid addition and money problems involving change.
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1 Worksheet
2 Quizzes
1 Video
• In this lesson, we will apply all that we have learnt in this unit and practise answering different styles of questions involving addition and subtraction with modeled solutions.
1 Slide deck
1 Worksheet
1 Quiz
1 Video