Improve the speed and accuracy of beginning learners with this simplified version of our kingshcool - speed drills - substraction timed test with answer - 6.000 problems - 100 Days - digits 0 100. That's all it takes to master the times tables. Have a stopwatch on your phone? Use it to see how fast your student can complete each page. This helps to develop instant recall of math facts. Kids also enjoy the challenge of beating their former time. Especially if you reward them for their successes