This file includes 24 one-minute addition timed tests to assess addition math fact fluency from 0-20. The first 18 timed tests (also known as math sprints or mad minutes) focuses on sums of one-digit numbers, since those are the ones students are expected to fluently master to meet Common Core Standards. The last 6 timed tests focus on sums with two-digit numbers. These are included for teachers who have students who need an additional challenge or who want to introduce these facts to their stud