A multiple is the result of multiplying a number by an integer. For example 2 × 5 = 10 so 10 is a multiple of 2 and 5.

Something that comes after something else.

Something that comes before something else.

Rounding means making a number simpler but keeping its value close to what it was.

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

Maths

Explain that decimal numbers with tenths can be composed additively

Explain that decimal numbers with tenths can be composed multiplicatively

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

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

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

Look at the number line. Which two multiples of 1 is a between?

5 is the previous multiple of 1 and 6 is the next multiple of 1. Which letter on the number line could this statement refer to?

7.1 is the number. Tick the pair of numbers that are the previous and next multiples of one.

What is 8.5 rounded to the nearest multiple of one?

What is 17.2 rounded to the nearest multiple of one?

Represent the following picture as a decimal number.

Tick the numbers that are multiples of 10.

Tick the missing numbers from the number line.

Tick the numbers that round to 100 as the nearest multiple of 10.

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

Lesson outcome