This resource is aimed at pupils in middle classes or SEN pupils at the beginning of work on addition of tens and units. It is based on addition without regrouping – units are added to larger tens and units up to 99. Laminate all of the pages in the resource and cut up into thirty-six separate cards. Pupils should work out the sum on the left side of each card and place a clothes peg on the correct answer on the right of the card. The tens are coloured black and the units red to assist with the addition.