If the next player plays a red 4, the difference is -9: (-13) - (-4) = -9. For example, if player #1 plays a red 5 (-5) and player #2 plays a black 8 (+8), the difference is -13: (-5) - (+8) = -13 Doing that will reinforce the skill of subtracting negative integers. To add another dimension to the game, you might have students always use subtraction. The game continues until someone shows a card that, when added to the stack, results in a sum of exactly 25. For example, if the card is a black 2, which has a value of +2, the player says (-1) + 2 = 1. The next player takes the top card from his or her pile, adds it to the first two cards, and says the sum. For example, if the card is a red 9, which has a value of -9, the player says 8 + (-9) = (-1) The second player turns up a card, adds it to the first card, and says the sum of the two cards aloud.
For example, if the player turns up a black eight, he or she says 8.Ĭontinue from one player to the next in a clockwise direction. Then ask the player to the right of the dealer to turn up one card and say the number on the card. In that case, explain to students that aces have a value of 1, jacks have a value of 11, queens have a value of 12, and kings have a value of 13.Īt the start of the game, have each player place his or her cards in a stack, face down. If students are familiar with the game, or if you want to provide an extra challenge, leave the aces and face cards in the deck. Note: If this game is new to students, you might want to discard the face cards prior to dealing. In other words a black seven is worth +7 (seven), a red three is worth 3 (negative 3). Every red cards represents a negative number. Put aside any extra cards.Įxplain to students that every black card in their pile represents a positive number. Have students deal out as many cards as possible from a deck of cards, so that each student has an equal number of cards. This game requires students to add and subtract positive and negative integers.Īrrange students into groups of two or more. That game involves simple addition and subtraction of whole numbers and can be played by students of any age. This card game is a variation of another teacher-submitted card game called Twenty-Five. Integers, positive, negative, numbers, addition, subtraction, game, card game Materials Needed practice addition and subtraction of positive and negative integers.
This adaptation of the card game Twenty-Five provides practice adding and subtracting positive and negative integers. Positive and Negative Integers: A Card Game
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