Domino — 1/1 — free printable diagram

How many spots are on the 1–1 domino?

This domino has 1 spot on one half and 1 spot on the other, so it is worth 2 in total.

One half

1

Other half

1

Total spots

2

Addition

1 + 1 = 2

Double?

Yes

• Each half of a domino carries its own number of spots, and the tile's value is the two halves added together: 1 + 1 = 2.
• Both halves match, so this tile is a double — the double 1. A double-six set has seven doubles, one for each number from blank to six.
• As a doubling fact it reads double 1 is 2, and backwards as half of 2 is 1.
• A full double-six set has 28 tiles: every pair of numbers from blank to six once each, counting a tile and its turned-round twin as the same tile.