A 1 to 100 number square is a very useful resource to help young children with addition and subtraction and there is one included at the end of this 4 page set of worksheets on addition. All these pages concentrate on adding a single digit to a 2-digit number. Probably the easiest way to do these is to start with the larger number and count on in ones. Fingers, or the number square, are also great for assistance. Make sure your child is really confident with adding single digits and has a good knowledge of counting up to 100 before attempting these pages, which are found in our 'Superbrains' section. Go to our resources on addition of a single digit to a 2-digit number.