Magic Triangles - Addition to 20
Designed to help students develop confidence using additon and subtraction strategies and becoming more efficient in this understanding, the Magic Triangles are perfect for lower primary maths rotations, relief teachers and fast finishers. Students solve simple addition problems using a range of addition and efficient mental strategies. Laminate to create a wipe-clean surface.
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Learning goals
- We are learning to add and subtract numbers within 20, using a variety of strategies, e.g. counting on, counting back, partitioning, subitising and part-part whole knowledge of numbers to 10 and to use the language of 'plus' and 'minus' in story problems.
- We are learning to model problems involving addition and subtraction, including simple whole-dollar money problems, in practical role-play situations.
- We are learning to use a range of strategies, to solve simple addition and subtraction problems.
- We are learning to solve problems involving modelling addition, subtraction, equal sharing and grouping, using different strategies.
- We are learning to recall addition facts to 20 and apply to related subtraction facts using a range of strategies.
- We are learning to use a range of mental and written strategies to solve simple addition and subtraction problems.
Curriculum alignment
AC9M1N04
9
Add and subtract numbers within 20, using physical and virtual materials, part-part-whole knowledge to 10 and a variety of calculation strategies
AC9M2A02
9
Recall and demonstrate proficiency with addition facts to 20; extend and apply facts to develop related subtraction facts
AC9M1N05
9
Use mathematical modelling to solve practical problems involving additive situations, including simple money transactions; represent the situations with diagrams, physical and virtual materials, and use calculation strategies to solve the problem
AC9M2N06
9
Use mathematical modelling to solve practical problems involving additive and multiplicative situations, including money transactions; represent situations and choose calculation strategies; interpret and communicate solutions in terms of the situation
ACMNA030
8.4
Solve simple addition and subtraction problems using a range of efficient mental and written strategies
ACMNA015
8.4
Represent and solve simple addition and subtraction problems using a range of strategies including counting on, partitioning and rearranging parts
MA1-1WM
old
Describes mathematical situations and methods using everyday and some mathematical language, actions, materials, diagrams and symbols
MA1-2WM
old
Uses objects, diagrams and technology to explore mathematical problems
MA1-3WM
old
Supports conclusions by explaining or demonstrating how answers were obtained
MA1-5NA
old
Uses a range of strategies and informal recording methods for addition and subtraction involving one- and two-digit numbers
MA1-4NA
old
Applies place value, informally, to count, order, read and represent two- and three-digit numbers
MA1-6NA
old
Uses a range of mental strategies and concrete materials for multiplication and division
MA1-CSQ-01
new
Uses number bonds and the relationship between addition and subtraction to solve problems involving partitioning
MA1-FG-01
new
Uses the structure of equal groups to solve multiplication problems, and shares or groups to solve division problems
VCMNA090
Represent practical situations that model sharing
VCMNA092
Recognise, describe and order Australian coins according to their value
VCMNA087
Recognise, model, read, write and order numbers to at least 100. Locate these numbers on a number line
VCMNA107
Solve simple addition and subtraction problems using a range of efficient mental and written strategies
VCMNA108
Recognise and represent multiplication as repeated addition, groups and arrays
VCMNA114
Apply repetition in arithmetic operations, including multiplication as repeated addition and division as repeated subtraction
VCMNA111
Count and order small collections of Australian coins and notes according to their value
VCMNA094
Recognise the importance of repetition of a process in solving problems
VCMNA103
Investigate number sequences, initially those increasing and decreasing by twos, threes, fives and ten from any starting point, then moving to other sequences
VCMNA089
Represent and solve simple addition and subtraction problems using a range of strategies including counting on, partitioning and rearranging parts
Australian Curriculum covers QLD / SA / WA / NT / TAS / ACT.
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