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Add-Sub Review T

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Planning notes

Level/Framework stage/Group: Stage 5 Review

Duration/Date: 3 Weeks

Target students- provide opportunities for success in reviewing their skills and understading.

Focus Achievement Objectives
NA3-7: Generalise the properties of addition and subtraction with whole numbers.
Choose critically from a range of mental strategies to solve addition and subtraction problems.
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Close to 100

Level Two
Level Three
Number and Algebra
Numeracy activities

Recall the number of tens and hundreds in 100s and 1000s.

Identify symbols for any fraction, including tenths, hundredths, thousandths, and those greater than 1.

Solve addition and subtraction problems using decomposition, leading to a written algorithm

 

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Make 1000

Level Two
Number and Algebra
Units of Work
In this unit the students form collections of 1000 objects. In doing this they examine the relationship between 1000 and smaller numbers, specifically 100 and 10.
  •  Develop an understanding of 1000 and the quantity for which it stands.
  •  Understand the relationship between 1000, 100 and 10.
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Compatible Numbers

Level Two
Number and Algebra
Numeracy activities

Solve addition problems by using compatible numbers.

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Addition and subtraction on the number line

Level Two
Number and Algebra
Numeracy activities

Change start-unknown problems to change-unknown problems.

Solve addition and subtraction problems by compensating with tidy numbers.

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Problems like 23 + ? = 71

Level Two
Number and Algebra
Numeracy activities

Solve addition and subtraction problems by compensating with tidy numbers.

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Alien Estimates

Level Three
Number and Algebra
Figure It Out activities
This is a level 3 number activity from the Figure It Out series. It relates to Stage 6 of the Number Framework. A PDF of the student activity is included.

make estimations for addition problems

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Addition and Subtraction Pick n Mix

Level Three
Number and Algebra
Units of Work
In this unit we look at a range of strategies for solving addition and subtraction problems with whole numbers. This supports students anticipating, from the structure of a problem, which strategies might be best suited to solving it.
  • Mentally solve whole number addition and subtraction problems using a range of strategies.
  • Use appropriate techniques to record mathematical thinking.
  • Predict the usefulness of strategies for given problems.
  • Evaluate the effectiveness of selected strategies.
  • Generalise the types of problems that are...
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