Addition and Subtraction
Outcomes
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MA2-5NA
Uses mental and written strategies for addition and subtraction involving two-, three-, four- and five-digit numbers
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Addition and Subtraction 1
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Recall addition facts for single-digit numbers and related subtraction facts to develop increasingly efficient mental strategies for computation (ACMNA055)
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Add three or more single-digit numbers
Examples
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Model and apply the associative property of addition to aid mental computation, eg 2 + 3 + 8 = 2 + 8 + 3 = 10 + 3 = 13
Examples
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Apply known single-digit addition and subtraction facts to mental strategies for addition and subtraction of two-, three- and four-digit numbers, including:the jump strategy on an empty number line, the split strategy, the compensation strategy, using pat
Play Activities 301Examples
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Use concrete materials to model the addition and subtraction of two or more numbers, with and without trading, and record the method used
Examples
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Select, use and record a variety of mental strategies to solve addition and subtraction problems, including word problems, with numbers of up to four digits
Examples
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Use the equals sign to record equivalent number sentences involving addition and subtraction and so to mean 'is the same as', rather than to mean to perform an operation, eg 32 - 13 = 30 - 11
Examples
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Add three or more single-digit numbers
- Recognise and explain the connection between addition and subtraction (ACMNA054)
- Represent money values in multiple ways and count the change required for simple transactions to the nearest five cents (ACMNA059)
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Recall addition facts for single-digit numbers and related subtraction facts to develop increasingly efficient mental strategies for computation (ACMNA055)
- Addition and Subtraction 2
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Addition and Subtraction 1