*In this chapter, pupils convert between fractions and decimals and calculate with decimals. *

Building on work from the previous chapter, pupils read, write, order and compare numbers with up to three decimal places. They recognise and use thousandths and relate them to tenths and hundredths, as well as decimal equivalents and measures.

Pupils round decimals with two decimal places to the nearest whole number and to one decimal place. They say, read and write decimal fractions and related tenths, hundredths and thousandths accurately, and read and write decimal numbers as fractions (eg, 0.71 = ^{71}⁄100).

Linked with previous work on addition and subtraction, pupils count using decimals and fractions above and below zero. They mentally add and subtract tenths, as well as one-digit whole numbers and tenths. They practise adding and subtracting decimals, as well as whole numbers with decimals, decimals with different numbers of decimal places and also complements of 1 (eg, 0.83 + 0.17 = 1). Pupils recognise and describe linear number sequences involving fractions and decimals (eg, 3 , 3^{1}⁄2, 4, 4^{1}⁄2...) and find the term-to-term rule in words (eg, add ^{1}⁄2).

Pupils multiply and divide whole numbers and those with decimals by 10, 100 and 1,000. In doing so, they interpret non-integer answers to division problems and express them in different ways according to the context. Answers are expressed as fractions, as numbers with remainders and as decimals (eg, 98 ÷ 4 = ^{98}⁄4 = 24 r2 = 24 ^{1}⁄2 = 24.5 ≈ 25).

By the end of this chapter, pupils use all four operations to solve length, mass, volume or money problems using decimal notation. They go beyond the measurement and money models of decimals to solve number puzzles involving decimals. As a result of their extensive work on place value in previous topics, pupils check the reasonableness of their answers confidently.