For each decimal subtraction problem, subract the second number from the first and type in the correct answer. Don't forget the decimal point. Use the TAB and the SHIFT+TAB keys, or the mouse to move from problem to problem.
After subtracting and typing in answers for all 20 decimal problems, check your answers. When you think they are all correct, press the 'Grade My Quiz' button. Your quiz grade will be
shown on the top right of the page. The answers with a check mark are correct. Those with an X are incorrect. The ones with an X will have the correct answers shown.
After you understand how to get all the correct answers, press the 'Give Me a New Quiz' button.