Recognise the place value of each digit in a four-digit number

What this means, in plain words

Place value is the idea that a digit is worth a different amount depending on where it sits: the 4 in 40 is worth ten times the 4 in 4.

A digit is one of the ten symbols, 0 to 9, that all numbers are written with.

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.