# Flexible additive strategies - Combinations to 10

This resource has been developed in partnership with the NSW Mathematics Strategy Professional Learning team, Curriculum Early Years and Primary Learners, and Literacy and Numeracy.

## Using the resource

This resource is the first section of a four-part resource supporting additive thinking. Use this resource in conjunction with the other resources in this series in order to support a connected network of critical mathematical concepts, skills and understanding.

### Task 1: Blocks on a bowl

Students use a container and five blocks to practice counting hidden items.

• Variation 1: Use more than one cup or container

• Variation 2: Adjust the quantity of blocks

### Task 2: Let’s talk 4

Students watch the ‘Let’s talk 4' part 1 and part 2' videos using the questioning in the videos to guide student thinking.

### Task 3: If you didn’t know

Students think of different strategies for addition without needing to count, including partitioning, using the commutative property, adjusting number using knowledge of equivalence and other known facts.

• Variation 1: Students create problems that could be solved using a particular strategy

• Variation 2: Investigate whether a particular strategy is as useful for addition as it is for subtraction

• Variation 3: Make fact families using unifix cubes and record each related number fact, describing similarities and differences between each fact

• Variation 4: Use dominoes record fact families

Students using DoE playing cards 0-5 to make two or more cards equalling five.

• Variation 1: Adapt the game to compose any quantity up to and including 10

• Variation 2: Use any operation

• Variation 3: Use the ace to represent eleven and adapt to game to find combinations to 20

### Task 5: Turn over 3

Students watch the Turn over 3 video and use the Turn over 3 game board.

• Variation 1: Play the game using subtraction

• Variation 2: Look for combinations of 20

• Variation 3: Play until the whole deck of cards is used

Students watch the video ‘Capture 10’ to learn how to play.