Here are 20 addition problems over 2 worksheets aimed at helping children practice addition using the "adding by adding units" technique - ie breaking down the bigger number into 10 and units. Some children will be able to do the problems without breaking down the larger number, but we've provided space for them to do so.
Adding by Adding Units Worksheets Set 1
This fun poster (which comes as pictured and with 2 fill-in-the-blanks versions) can be put on display or laminated to be kept as a reference. Understanding and learning the "teen facts" makes everything that comes later easier!