Introduce the most simple of subtraction by taking one away from numbers 1 to 10. This set of 3 worksheets works through some word problems and then introduces a few "sums" for the children to try, all with the help of a number line if necessary.
There are two worksheets in this set, introducing simple "count and compare" activities and also the most simple language of comparison - more, less or the same. They are available in both UK and US school fonts.