Read, write, order and compare numbers with up to three decimal places

What this means, in plain words

A decimal writes parts of a whole using the places after the point: tenths, then hundredths, then thousandths.

Comparing asks which is larger or smaller. Ordering puts several of them in a line from smallest to largest.

Number work here is about how our number system is built, and about knowing what a number is worth rather than just how it is spelled.