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Subtraction

2,021 bytes added, 03:21, 3 December 2022
Entering Answers
Let your child answer a few problems as you observe. He or she simply presses the correct number from the top row of keys. If the answer to be entered is more than one digit, the right-most digit must be entered first, as indicated by the flashing question mark. In other words, problems must be solved from right to left, just as they would be in the traditional pencil-and-paper method. This method reinforces the correct order of problem solution. (When selecting Beginning Level numbers, enter from left to right.)
====How the Computer Responds====
 
If the problem is answered correctly, an animated picture appears. Your child then presses '''ENTER''' to continue to the next problem. If the problem is answered incorrectly, the computer returns a screen message and encourages your child to press '''ENTER''' to try again. If a second incorrect answer is given, the screen border turns red and flashes. To continue, your child presses '''ENTER''' again, and the computer gives the answer, with a message to "Study the Answer." When your child presses '''ENTER''' again, the next problem appears.
 
====Advancing or Moving Back====
 
If your chi Id answers five of the previous six problems correctly, a "Good News" report is displayed. He or she then advances to the next level. If three problems in a row are answered incorrectly, a "Bad News" report appears, and your child moves back one level.
 
====Changing Levels====
 
You can change levels any time the question mark is flashing. To leave this level, simply press the letter E for "exit." An "Exit" screen appears, which reports on your child's progress. Press '''ENTER''' to return to the title screen.
 
Let's try another level. Press any key to go to the "Levels 1-54" screen. This time, enter '''24''' (from left to right) as the Beginning Level. Then type your child's name again, and press '''ENTER''' to continue.
 
====Regrouping====
 
At Level 24 your child is given the choice of regrouping (borrowing) visually on the screen or of regrouping mentally without displaying the process. To use the regrouping option, press the '''SPACE BAR''' when instructed on the screen. A small question mark appears above the column from which the value is being borrowed or taken. Type the new value for that digit. Then a small question mark appears beside the column to which the value is being regrouped. Type in this number (it will be a 1), subtract the digits in that column, and type the answer. Finish the problem using the new value for the digit from which it was "borrowed".
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