Simple calculations using two numbers are known as number facts. For example 2 + 4 = 6

Bridging is a mental strategy which uses addition or subtraction to cross a number boundary.

Use known facts and mental strategies to calculate with decimal numbers within and across a whole

Maths

Explain that decimal numbers with tenths can be composed additively

Explain that decimal numbers with tenths can be composed multiplicatively

Use knowledge of column addition and subtraction to calculate with decimal numbers

Use representations to round a decimal number with tenths to the nearest whole number

In this unit pupils will calculate with decimal numbers using column addition and subtraction. In the future unit pupils will identify hundredths as part of a whole and describe and represent hundredths as a decimal fraction. They will compare and order decimal numbers with hundredths.

In the prior unit pupils identified tenths as part of a whole and describe and represented tenths as a decimal fraction. They counted tenths in different ways and compared and ordered decimal numbers with tenths. In this unit pupils will calculate with decimal numbers using column addition and subtraction.

In this unit pupils will extend their understanding of formal calculation strategies to use column methods to add and subtract with decimal numbers.

Compose and calculate with decimals including column addition and subtraction

I know 8 − 5 = 3 so 0.8 − 0.5 = {{  }}

Which of these pairs of numbers sum to make 1?

Use a known number fact to help you solve: 1 − 0.3 = {{  }}

Fill in the missing number for the equation represented by the number line.

Fill in the missing number: ___ − 0.7 = 0.8 

I know 7 − 5 = 2 so 700 − 500 = {{  }}

Tick all of the equations that can represent this part-part-whole model.

I know 12 − 5 = 7 so 120 − 50 = {{  }}

What are the missing numbers that the nine would need to be partitioned into to bridge 10 for this example.

Use known facts and mental strategies to calculate with decimal numbers within and across a whole

Lesson outcome