What is Signo?
Signo is a card game designed to help players practice signed operations. Mainly, whether or not the outcome of an equation would be positive or negative. The ever changing nature of the equation used and player-to-player feedback allows for a dynamic learning experience that keeps people engaged in their practice.
How to play
Each deck contains 55 cards:
- Four sets of numbers 1-8. Two sets should be positives, two sets should be negative. Totaling up to 32 cards.
- Three cards of the each operator +, -, x, and divide.
- Three "Draw Two" cards.
- Four "Choose Operator" cards.
- Four "Reverse" cards.
You will also have a play order indicator:

This shows which order to operate the equation.
Starting the Game:
- To start: shuffle the deck. Then deal each player 6 cards.
- Reveal the top card of the deck. If it is an operator place it in the center of the players. If it is a number, place one in front of a player who does not have a card in front of them (leave it face up. it does not go into their hand.) Repeat until each player has a card in front of them. If you get a repeat (such as another operator when you already have one or a number when everyone has one) place it on the bottom of the deck.
After the initial setup, the play area should look like this:
- Shuffle the deck again.
- Decide who goes first by any means you like. One method you can use is rock, paper, scissors.
- First player decides which direction the play indicator faces and places the indicator between their and another player's number pile. .
- Start the game by following the turn order.
Turn Order:
When it becomes someone's turn:
1. A player should first look at the indicator to identify what the equation is and which direction the indicator is pointing.
2. A player can play up to 1 Number, Operator, or Function Card if it is their turn.
A number card can be played if its sign is the correct outcome of the equation. Even if the number itself is not the correct answer. For example:
2 X -8

A player can play any negative number here since the sign of the answer would be negative.
When a number card is played, it goes on top of the number pile of the player who played it.
An operator can be played to change the equation's operator. Play it on top of the operator pile.
A function card can be played as well. Draw 2 makes the next player draw 2 cards when their turn starts. Reverse changes the play order and flips the indicator. For example, if turns go in a clockwise direction, the direction will become counter-clockwise.
After a function card is played, it goes in a separate pile away from the others.
3. After a card is played, another player can point out if the play was incorrect (such as playing a negative when the equation results in a positive). If the card that was played is incorrect, the player who played it draws 1 card.
4. The turn ends after a player plays a card, effects from function cards are carried out, and players point out mistakes. At the end of a player's turn, if they did not play a card, the draw a card.
Game Rules: