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Column Subtraction: Two-Column Problems With Help

The following exercise is column subtraction, two-column problems with help.

Sometimes you will have to click on the left number at the top to cross it out. Then, subtract one from the number you crossed out and put this new number in the textbox above where you clicked. Finally, put a 1 in front of the number that's in the box on the right.

Remember, when subtracting columns, always go from right to left. When you think you know the material, please click on the Continue to Next Page link to continue learning about Column Subtraction. Please take your time: take whatever time you need to learn the material.


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