# subtraction

## Checking Addition and Subtraction by Estimation

- Numeracy Activities
- Number and Algebra
- Level Three

Solve addition and subtraction problems by using place value.

## When Subtraction becomes Addition

- Numeracy Activities
- Number and Algebra
- Level Three

Solve subtraction problems by using addition.

## Subtraction to Subtraction

- Numeracy Activities
- Number and Algebra
- Level Three

Solve subtraction problems by using addition.

## You Don't Need the Number

- Numeracy Activities
- Number and Algebra
- Level Two

Solve addition problems by using compatible numbers.

## Subtraction with tenths

- Numeracy Activities
- Number and Algebra
- Level Four

Solve problems that involve adding and subtracting decimals.

## A Balancing Act

- Numeracy Activities
- Number and Algebra
- Level Three

Solve problems using a combination of addition, subtraction, multiplication and division mental strategies.

## Close to 100

- Numeracy Activities
- Number and Algebra
- Level Two

Recall the number of tens and hundreds in 100s and 1000s.

Identify symbols for any fraction, including tenths, hundredths, thousandths, and those greater than 1.

Solve addition and subtraction problems using decomposition, leading to a written algorithm

## Decomposition - A Written Form of Subtraction

- Numeracy Activities
- Number and Algebra
- Level Three

Solve addition and subtraction problems using decomposition, leading to a written algorithm.

## A Standard Written Form for Addition

- Numeracy Activities
- Number and Algebra
- Level Three

Solve addition and subtraction problems using decomposition, leading to a written algorithm.

## Multiple Ways to Add and Subtract

- Numeracy Activities
- Number and Algebra
- Level Four

Use multiplication to solve addition and subtraction problems.