VC2M2N04
add and subtract one- and two-digit numbers, represent problems using number sentences and solve using part-part-whole reasoning and a variety of calculation strategies
- using the associative property of addition to assist with mental calculation by partitioning, rearranging and regrouping numbers using number knowledge, near doubles and bridging-to-10 strategies; for example, calculating 7 + 8 using 7 + (7 + 1) = (7 + 7) + 1, the associative property and near doubles; or calculating 7 + 8 using the associative property and bridging to 10: 7 + (3 + 5) = (7 + 3) + 5
- using strategies such as doubles, near doubles, part-part-whole knowledge to 10, bridging tens and partitioning to mentally solve problems involving two-digit numbers; for example, calculating 56 + 37 by thinking 5 tens and 3 tens is 8 tens, 6 + 7 = 6 + 4 + 3 is one 10 and 3, and so the result is 9 tens and 3, or 93
- representing addition and subtraction problems using a bar model and writing a number sentence, explaining how each number in the sentence is connected to the situation
- using mental strategies and informal written jottings to help keep track of the numbers when solving addition and subtraction problems involving two-digit numbers and recognising that zero added to a number leaves the number unchanged; for example, in calculating 34 + 20 = 54, 3 tens add 2 tens is 5 tens, which is 50, and 4 ones add zero ones is 4 ones, which is 4, so the result is 50 + 4 = 54
- using a physical or mental number line or hundreds chart to solve addition or subtraction problems by moving along or up and down in tens and ones; for example, solving the problem ‘I was given a $100 gift card for my birthday and spent $38 on a pair of shoes and $15 on a T-shirt. How much money do I have left on the card?’
- using Aboriginal and Torres Strait Islander Peoples’ stories and dances to understand the balance and connection between addition and subtraction, representing relationships as number sentences
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Number Talks - Double Digit Subtraction Task Cards
Encourage the use of mental math strategies with 2-digit subtraction number talks task cards.
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2-Digit Subtraction Using Bar Models- Differentiated Worksheets
Review and assess your students’ subtraction skills with differentiated 2-digit subtraction worksheets focusing on the bar model strategy.
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2 Digit Subtraction with Place Value Disks - Matching Activity
Use place value disks to solve 2-digit subtraction problems with a matching activity.
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Add and Reveal the Picture PowerPoint – Addition Practice (Basic)
An appealing PowerPoint for students to interact with when practising addition facts.
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Missing Addend Addition Picture Puzzle – Level 2
Consolidate students’ addition skills with this missing addends worksheet.
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Friends of 20 – Addition Match-up Cards
A match-up activity exploring friends of twenty.
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Double Minus One - Worksheet
A worksheet to help students demonstrate their understanding of near doubles.
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Double Plus One - Dice Roll Worksheet
A worksheet to help students demonstrate their understanding of near doubles.
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Double Plus 1 – Game Boards
30 game boards to use when working with near doubles.
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Rainbow Facts - Zero-Tail Game
Practise rainbow number facts when solving addition problems involving two-digit numbers with this fun game.
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2 Digit Subtraction Model Match-Up
Use a rigorous subtraction matching game to match subtraction word problems with number sentences, bar models, and solutions.
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Addition on a Number Line - Jump Strategy Slide Deck
Model adding two-digit numbers with regrouping using a number line and the jump strategy with a handy instructional slide deck.
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The Addition Quest – Whole Class Game
Find the hidden gems and place their numbers into the correct positions on the worksheet to solve the sums.
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Money and Financial Mathematics – Lower Years Interactive PowerPoint
An engaging 44-slide interactive PowerPoint to use in the lower years classroom when learning about money and financial mathematics.
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Double +1 Addition Dominoes
A set of addition dominoes to use in the classroom when applying the double +1 strategy.
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Double Minus One - Grid Worksheet
A fun worksheet to help students demonstrate their understanding of near doubles.
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Double Minus One - Dice Roll Worksheet
A worksheet to help students demonstrate their understanding of near doubles.
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Number Matching Puzzle - Addition
A hands-on game to play when learning about adding numbers.
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Subtraction within 100 - Two-Digit Subtraction Puzzles
Practise subtraction strategies with a set of printable maths puzzles.
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Addition to 1000 Sunflower Interactive Activity
Practise solving addition problems using a variety of addition strategies with this interactive activity.
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Hundreds Chart Strategy Addition Mini Book
Use this mini-book to help your students learn how to use the hundreds chart as a strategy to solve addition sums.
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Hundreds Chart Addition Strategy Interactive Activity
Practise using the hundreds chart as an addition strategy with this fun interactive activity.
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Adding within 100 Bar Model Task Cards
Practise using the bar model to add numbers within 100 with this set of task cards.
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Adding Within 100 - Bar Model Match-Up Activity
Practise using the bar model to add numbers within 100 with this match-up activity.
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2-Digit Subtraction Using Bar Models - Task Cards
Review and assess your students’ subtraction skills with a set of 2-digit subtraction task cards focusing on using the part-part-whole model.
- Plus Plan
Number Matching Puzzle - Subtraction
A hands-on game to play when learning about subtracting numbers.