The image to the left shows how place value blocks can be used to represent different numbers.
We call the 'ones' blocks "units"
We call the 'tens' blocks "rods"
We call the 'hundreds' blocks "flats"
We call the 'thousands' blocks "cubes"
Number lines can also be used to help identify place value by skip counting the ones, tens, hundreds or thousands you would like to work with.
A.3 Value of a digit
A.9 Rounding
A.11 Rounding puzzles
A.12 Even or odd
A.16 Roman numerals
A.19 Compare numbers
A.20 Put numbers in order