Mystery addition tables

Addition tables with the headers hidden: work out the headers, then fill in the table.

About this worksheet

The number to add is given at the top of the first column, and the squares beneath it show the sums. Students subtract to find the row headers, use the first row to find the other column headers, and then complete every sum.

For younger children, show every header and let them fill a small square of sums. Every table has exactly one solution, and the table structure (rows, columns, adding the same number) becomes visible.

Printing

US Letter or A4, portrait: choose your paper size above. Print at 100 percent (actual size). Use "Black and white" for the copier, or "Color" for display pages and mini books.

Popular versions

Ready-made settings for common topics.

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