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1. First, put the mouse pointer over the x's on the top number of the long addition problem on the bottom right of the page. Then click on the mouse to set the number of digits. Set the second number the same way. When you have the number of digits set for both, press the reset button. The new long addition problem is now ready to be solved.

2. The shaded blocks tell you where you need to type in numbers to solve the problem. Use the control arrow keys or mouse to move from block to block. Type the correct number in each block. 2

3. Check your answer by using the mouse to put the cursor over the black check at the bottom left of the page. If your numbers are right, they will turn blue. 2 If any are wrong they will turn red. 2 You can change the red numbers and check your answer again. When they all turn blue when you check them, then you did it right. Press the reset button to do it again.

4. Need help? Put the cursor over the equals sign = to see the solution!

5. Click the teacher's apple for more great math challenges!

2. The shaded blocks tell you where you need to type in numbers to solve the problem. Use the control arrow keys or mouse to move from block to block. Type the correct number in each block. 2

3. Check your answer by using the mouse to put the cursor over the black check at the bottom left of the page. If your numbers are right, they will turn blue. 2 If any are wrong they will turn red. 2 You can change the red numbers and check your answer again. When they all turn blue when you check them, then you did it right. Press the reset button to do it again.

4. Need help? Put the cursor over the equals sign = to see the solution!

5. Click the teacher's apple for more great math challenges!

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Click the x's to set the number of digits. Then press reset.

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Reset addition problem.

Check your answer. Blue numbers are correct. Red are incorrect.

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Show solution.

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Type the answer. Use the control arrow keys or mouse to move between digits.

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