Missing Number Madness
Students make ‘calculator friendly’ number sentences using inverse operations and then use calculators to solve them.
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Learning goals
- We are learning to use inverse relationships between addition and subtraction to find unknown values using different strategies.
- We are learning to use number sentences and partitioning to demonstrate the connection between addition and subtraction.
- We are learning to use counting-on and partitioning to understand the connection between addition and subtraction.
Curriculum alignment
AC9M3A01
9
Recognise and explain the connection between addition and subtraction as inverse operations, apply to partition numbers and find unknown values in number sentences
ACMNA054
8.4
Recognise and explain the connection between addition and subtraction
ACMNA029
8.4
Explore the connection between addition and subtraction
MA2-1WM
old
Uses appropriate terminology to describe, and symbols to represent, mathematical ideas
MA2-2WM
old
Selects and uses appropriate mental or written strategies, or technology, to solve problems
MA2-3WM
old
Checks the accuracy of a statement and explains the reasoning used
MA2-5NA
old
Uses mental and written strategies for addition and subtraction involving two-, three-, four- and five-digit numbers
MA2-RN-01
new
Applies an understanding of place value and the role of zero to represent numbers to at least tens of thousands
MA2-RN-02
new
Represents and compares decimals up to 2 decimal places using place value
MA2-AR-01
new
Selects and uses mental and written strategies for addition and subtraction involving 2- and 3-digit numbers
MA2-AR-02
new
Completes number sentences involving addition and subtraction by finding missing values
Australian Curriculum covers QLD / SA / WA / NT / TAS / ACT.
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