This set of graduating drills focuses on working with numbers under 20, encouraging students to build fluency and accuracy when adding and subtracting. Each page contains 50 addition and 50 subtraction problems for a total of 100 problems per page, and each page increases the sum/difference maximum. 7s focuses on sums and differences 7 and below, 8s 8 and below, and so on. This allows students to master basic facts at their own pace.
The set consists of numbers 7-19.