The following exercise will help you learn the basic subtraction equations for the number 1. When you think you know the equations, please click on the Continue to Next Page link to test your knowledge. Please take your time: take whatever time you need to learn the material.
DodgerBlue Box Chartreuse Box DarkOliveGreen Box SeaGreen Box Empty Box Navy Box MediumSeaGreen Box DarkSeaGreen Box Brown Box Orchid Box PowderBlue Box Wheat Box
minus
DodgerBlue Box
equals
DodgerBlue Box Chartreuse Box DarkOliveGreen Box SeaGreen Box Empty Box Navy Box MediumSeaGreen Box DarkSeaGreen Box Brown Box Orchid Box PowderBlue Box
Next Problem
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