# subtraction

## Adding Tens

- Numeracy activities
- Number and Algebra
- Level One

Solve addition and subtraction problems using groups of ten.

Solve addition and subtraction problems by using place value partitioning.

## Imaging Many Hands

- Numeracy activities
- Number and Algebra
- Level One

Solve addition problems to 20 by counting all the objects in their head.

Solve subtraction problems from 20 by counting all the objects in their head.

Solve subtraction problems to 100 by counting back in their heads.

## Teens and Fingers

- Numeracy activities
- Number and Algebra
- Level One

Solve subtraction problems from 20 by separating sets and counting all the objects.

Solve subtraction problems from 20 by counting all the objects in their head.

Recall the facts up to 10, and the teen facts.

## Using Fives

- Numeracy activities
- Number and Algebra
- Level One

Solve subtraction problems from 20 by separating sets and counting all the objects.

Instantly recognise patterns to 10 including doubles.

## Both Hands

- Numeracy activities
- Number and Algebra
- Level One

Solve addition problems to 20 by joining sets and counting all the objects.

Solve subtraction problems from 20 by separating sets and counting all the objects.

Solve addition problems to 20 by counting all the objects in their head.

Solve subtraction problems from 20 by counting all the objects in their head.

Instantly recognise patterns to 10 including doubles.

## Challenging hands problems

- Numeracy activities
- Number and Algebra
- Level One

Solve addition problems to 20 by joining sets and counting all the objects.

Solve subtraction problems from 20 by separating sets and counting all the objects.

## Estimating for Accuracy

- Units of Work
- Number and Algebra
- Level Five

This unit covers with a wide range of estimating methods that are essential in checking calculator answers for errors.

## Rolling Problems

- Numeracy activities
- Number and Algebra
- Level Three

In this activity we work with four digit numbers, adding and subtracting 1, 10, 100 and 1000 to these.

## Algebra Relays

- Numeracy activities
- Number and Algebra
- Level Three

This activity provides students with a fun, game context in which to practice their early algebra skills.

## Cards to 24

- Numeracy activities
- Number and Algebra
- Level Three

In this activity students use a deck of cards (or create their own set of cards with numbers on) to play a version of the 24 game. Students will use four cards and combinations of the four arithmetic operations to try to make a total of 24.