A domino is a ready-made addition problem: two halves, each with its own dots. The child counts the dots on the left half and writes the number, counts the right half and writes that number, and then adds them. The dots sit in the same patterns as on a real domino, so with practice the child starts to see five or six at a glance instead of counting one by one.

Set Dots to Up to 6 for an ordinary domino set, or to Up to 9 for bigger numbers and sums up to 18. Choose four or six dominoes on a page. Every domino on a page is different.

Press New sheet for new dominoes. The answer key prints on a second page only when you ask for it. Every sheet prints in color or black and white, on US Letter or A4. Nothing to sign up for.

12 ready-to-print sheets

• Domino adding · Up to 6 dots · 6 dominoes
• Domino adding · Up to 6 dots · 6 dominoes · set 2
• Domino adding · Up to 6 dots · 6 dominoes · set 3
• Domino adding · Up to 6 dots · 4 dominoes
• Domino adding · Up to 6 dots · 4 dominoes · set 2
• Domino adding · Up to 6 dots · 6 dominoes · set 4
• Domino adding · Up to 6 dots · 4 dominoes · set 3
• Domino adding · Up to 9 dots · 6 dominoes
• Domino adding · Up to 9 dots · 6 dominoes · set 2
• Domino adding · Up to 9 dots · 4 dominoes
• Domino adding · Up to 9 dots · 4 dominoes · set 2
• Domino adding · Up to 9 dots · 6 dominoes · set 3