Give an answer to the subtraction problem quickly

In this exercise, solve the subtraction problem as quickly as you can.

▶ You will see a circular progress bar with the subtraction problem.

▶ Click 'Start' to begin and 'Stop' to pause.

▶ Use the number pad to answer quickly.

▶ You will see your answer right after submitting.

▶ Press New Question button, to try again.

Enjoy solving subtraction problems quickly!