Addition
Large-number addition
Add two, three, or four values with five, six, or seven digits while maintaining alignment across long columns.
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Large mixed-digit addition
Add two, three, or four mixed-width values with five-, six-, or seven-digit selections and multiple regrouping steps.
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Right-align the ones places, estimate the total, add one column at a time, and compare the exact result with the estimate.
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Customize this worksheetLearning objective
What this activity builds
Maintain accurate place-value alignment across several large addends of different widths.
Worked example
What is 3,405,012 + 286,709 + 41,880?
3,733,601
Align all three values at the right edge and add from ones through millions, including each carry.
Teaching notes
Make the practice count
- Use a place-value chart for the longest selected width.
- Write a subtotal after two addends when the full column becomes visually crowded.
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A useful next step
Related activities
Addition
Large horizontal addition
Add signed three- or four-digit values in horizontal form using place-value, compensation, or a vertical rewrite.
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