In this program there is a subtraction problem at the top of the screen with the second number blank. The program voice says (for instance) "Seven minus what makes three? Click the correct answer." There are four numbers at the bottom of the screen, and the student should click the correct choice from among them. If the student clicks the correct number, the voice says "Yes, seven minus four equals three."
Vertical Subtraction If this is selected then the number statement at the top of the screen will be arranged vertically.
Horizontal Subtraction If this is selected then the number statement at the top of the screen will be arranged horizontally.
Prompt(Blink) This is checked by default. If the student fails to find the correct answer within ten seconds, the program guides him/her to the correct choice by making the correct choice blink.
Congratulatory Animation If this is selected, then any and all of the numbers in this box will be used. To deselect this choice, click it again and selection will be ended.
Select Random Numbers If this is selected, then the program will choose the numbers to be used in the problems.