Read the question

Vertical addition of three or more single digits
The question content

Then answer and click the Submit button to send the answer and view the results.

In case of an incorrect answer

Vertical addition of three or more single digits - answer incorrect
The answer result

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Then click the Solution To view instructions on how to answer correctly.

Vertical addition of three or more single digits - solution 1
Step 1
Vertical addition of three or more single digits - solution 2
Step 2

In case of a correct answer

Vertical addition of three or more single digits - answer correct
Correct result

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and then press the Next to continue answering the next question.