› basic-additionBasic Addition (With Sums up to 10) - Super Teacher Worksheets These basic addition fact worksheets are slightly more difficult, for students in grades 1 and 2. All problems have sums less than 20. More Basic Addition Worksheets. We have many more basic addition worksheets. Daily word problems, doubles, doubles +1, making 10, and much more. Visit this link for a full list of basic addition topics.