Addition and Subtraction

Math Games

"DOS" 

(Uno + Uno)

Addition and Subtraction Game

Number of Players:

Level: Grades 1 and 2

Skills: Addition & Subtraction of 1-digit numbers

What You Need:

• Deck of Uno Cards
• Pair of six-sided dice
• Game-board

Preparation:

Shuffle the deck of Uno cards and deal the cards face down to each player. Make sure each player has an equal amount of cards at the end of the deal. If there are a card or cards left over after each player has an equal amount, place those cards face down in middle of the players. This face down pile is the discard pile. 

Place the game-board down on table in the middle of the players.

Object of the Game: To be the first player to get rid of all of their cards!

How To Play:

• Player 1 turns rolls the dice. If the number rolled on the dice is a 1, 2, or 3, player 1 will subtract two of the numbers on their cards. If the number rolled on the dice is a 3, 4, or 5, player 1 will add two of the numbers on their cards. The player must look at the game-board and look in their hand to see if they have two cards that will either add or subtract to a number that is in one of the squares on the game-board.

If the player has a pair of cards that adds or subtracts to a number on a square of the game-board, they say the addition or subtraction statement out loud and then place one of their markers on one square of the game-board that matches their sum or difference. They then get rid of the those two cards by placing them face down in the discard pile. 

Once a player covers a square with their marker, no one else, including that player, can use that covered number for their sum or difference.

There are four game-boards. 

• If the player does not have a pair of numbers in their hand that add or subtract to a number on the game-board, play goes to next player and continues in like manner.
• After a player says their addition or subtraction statement out loud, the other players can challenge it, if they think it is incorrect. If it is incorrect, the player whose turn made the false statement has to keep those two cards and the play continues with the next player.

• When a player is down to their last two cards, the must shout out loud "UNO plus UNO" (or DOS).

If you want to make it even more like the classic UNO game, you can keep the "Skip" cards in the deck, and players can use them to skip over players who are down to their last two cards.

• The first player to get rid of all of their cards ins the winner!

Circle Climb 1: In this addition and subtraction activity, students get to enjoy figuring out what numbers to fill in the empty circles with.

Skills: Single and double-digit addition and subtraction.

How To Play: Fill in all of the empty circles to make each addition and subtraction statement true.

Check out the picture below of the first Circle Climb Activity. Just click the Circle Climb 1 link to print it off and get started adding and subtracting up and down the circles!