# 2:Finding the missing number in an addition calculation – using a number line

To help us find the missing number in an addition calculation we can use a number line. watch carefully as we use the numbers we have to help us solve the calculation.

# 1: Finding the missing number in an addition calculation – using a number line

To help us find the missing number in an addition calculation we can use a number line. watch carefully as we use the numbers we have to help us solve the calculation.

# S3: Subtraction using a number line

Using a number line we can subtract within 30. It is important to clearly mark the starting and ending numbers. Make sure that when you jump that you move backwards only by one number at a time. We are subtracting 1 each time we jump backwards.

# S3: Subtraction within 10 using a number line

Using a number line we can subtract within 10. It is important to clearly mark the starting and ending numbers. Make sure that when you jump that you move backwards only by one number at a time. We are subtracting 1 each time we jump backwards.

Partitioning is a good way to complete addition calculations. You could also use this method to help you work out calculations mentally.

When you use this method, remember to keep your digits in the correct column.

# A2: Counting On Using a Numberline

Using a printed a number line the children can solve simple calculations within 10 by counting on.

Remember to underline the number your start on. Count the jumps carefully and underline the number you end on.

# A1: Adding the Largest Number First

Using counters or other practical apparatus the children can find the sum of two single digit numbers.

Remember to form each number correctly and count carefully!

# 2 digit add 1 digit using a ten frame

Using a ten frame helps children see the relationship between numbers and reinforces their understanding of number bonds.

# 1 digit add 1 digit using a ten frame

Using a ten frame helps children see the relationship between numbers and reinforces their understanding of number bonds.

# Doubling a two digit number using partitioning

Using partitioning, doubling a two digit number becomes much easier.

After you have watched the video below use the strategy to double these numbers.

Double 24

Double 46

Double 37

Double 29