# Subtraction Game & Addition Game in One – Tac Tix

Addition Game & Subtraction Game in One – Tac Tix is a strategic thinking game for two players which incorporates Addition and Subtraction Fact Practice.

\$3.80

# Subtraction Game & Addition Game

## Tac Tix

Addition & Subtraction Game – Tac Tix

### Addition Game & Subtraction Game in One:

Tac Tix is a strategic thinking Math game for two players. Each player takes turns to remove a counter or counters from the board. The winner of the game is the one who forces their opponent to remove the last counter.

What you Need
:

2 players
1 game board
16 counters

### Preparation:

– Place 16 counters over the numbers on the board.
– Decide on the number to practice adding or subtracting e.g. If 10 is selected then 10 is added or subtracted to each number when uncovered.

### How to Win:

– Force your opponent to remove the last counter.

### How to Play:

1. The person with the longest little finger goes first. Take turns going first in the following games.
2. Player 1 removes 1, 2, 3 or 4 adjacent (side by side) counters from along one of the straight lines. The player then answers the algorithms revealed.

NB A player may not remove a series of pieces if there is an empty space between the pieces.

3. Player 2 then does the same.
4. Play continues until one player is forced to remove the last counter.

### Variations:

– Only answer the last algorithm revealed by each player on their turn.
– Change the number to be added or subtracted e.g. 4, 5, 6, 7, 9, 8, 11, etc

Subtraction Game

### To Note:

– I like starting this game by adding and subtracting 10 then move on to other numbers.

### Before the Game:

– Use a Hundreds Chart to explore patterns for adding and subtracting ten from a number and other strategies.

– Discuss possible efficient strategies for adding & subtracting 10 and other numbers

### During the Game:

– Monitor the players to see which strategies they are using.

### After the Game:

– Think about where to next?

### Extension:

– Mathematicians have studied this game for a very long time and have figured out there is a way for the person who moves second to always win. Try to discover this method.

Hint: The winning strategy has something to do with removing pieces that are ‘symmetrically opposite’.

– Search the Internet for an online version of this game i.e. Play this game against a computer.
– Design your own five by five or six by six Tic Tax board.