Download Add to Favorites Add to Folder creative writing children's book activities classroom tools language arts and writing vocabulary Create new folderCREATE NEW FOLDER Share Two sets of addition problems with answers that add up to 12 and 18. Authored by: Scott Foresman, an imprint of Pearson Grade: 1 | 2 | 3 | 4 | 5 Subjects: Addition Subtraction Mathematics + show tags TYPE: Worksheets