Ages 9-11 | KS2.ii Let's Play the Integers card game (Subtracting integers)

[Jhun]

Activity Time

15 - 20 minutes

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Introduction/Overview
Playing a deck of cards with friends is always enjoyable to pass the time, but you can also use them to play a fun math game. In this game, Students will subtract integers using a deck of cards, red cards are negative integers while black cards are positive integers. This is a great follow up on our previous addition of Integers card game.

What you need
Fruits Playing Cards Integers Cards game- Activity Sheet 1* Integers Cards game- Activity Sheet 2

Procedure

In this game, Students will subtract integers using a deck of cards, red cards are negative integers while black cards are positive integers. This is a great follow up on our previous addition of Integers card game. Steps: Print the Fruits Playing Card (I recommend cardboard) Cut the Fruits Playing Card. Download the Integers card game- Subtracting integers Activity sheet 1* and Activity Sheet 2 Warm-up Activity : Distribute Activity sheet 1 to your students. Have a brief discussion on Subtracting Decimals using the examples given in Activity Sheet 1. Make sure you explain and model how to answer the 2 examples on the sheet before students start answering on their own Example :​ a. -7 - 9 = n​ Solution: First, keep the first number (known as the minuend). -7 - 9 = n Second, change the operation from subtraction to addition. -7 (+) 9 = n Third, get the opposite sign of the second number (known as the subtrahend) -7 + (- 9) = n So the equation becomes -7 + (-9) = n Finally, proceed with the regular addition of integers. Since they have the same signs just add the numbers and keep the sign of the numbers. -7 + (-9) = -16 Example :​ b. -6 - -8 = n​ Solution: First, keep the first number (known as the minuend). -6 - -8 = n Second, change the operation from subtraction to addition. -6 (+) - 8 = n Third, get the opposite sign of the second number (known as the subtrahend) -6 + (+ 8) = n So the equation becomes -6 + 8= n Finally, proceed with the regular addition of integers. Since they have different signs Subtract the numbers and keep the sign of the numbers with the greatest absolute value. -6 + 8 = 2 2. Ask the students to answer Activity sheet 1* (Subtracting Integers) 3. Afterward, discuss the answers to Activity sheet 1(Subtracting Integers) Main Activity : Option 1 (Teacher Initiated Activity) Distribute activity sheet 2 to your students. Shuffle the Fruits Playing Card and place them in the middle of the table face down. Pick 2 Fruits Playing Card and ask the students to write the equation on the Activity sheet. Red cards are negative integers while black cards are positive integers. Assign picture cards, such as jacks, queens, and kings, a value of 10. For example, Jack =11, Queen =12 and King =13. If player A, draws Red 5 and Black 6, they should say, "(-5) - 6 = n " Then if player B, draw (Red) 4 and (Black) 5, then the number sentence is "(-4) - 5 = n" Do this until your students have at least written 10 equations on their sheets. Afterward, ask them to find the difference of the integers on their activity sheet 2. Discuss the answers to the equations. Option 2 (Student Initiated Activity) Ask the students to find a partner. Distribute activity sheet 2 to your students. Set up the timer, and play the game for 10 to 15 minutes. Ask the students to shuffle Fruits Playing Card and then distribute them evenly with the number face down. So for 2 players, each player should have 26 cards. Each player should keep their cards in a stack. Assign picture cards, such as jacks, queens, and kings, a value of 10. For example, Jack =11, Queen =12 and King =13 Each player turns two cards face up, reads the number, and add the integers. The equation will then be placed in the Activity sheet 2. If player A, draws Red 5 and Black 6, they should say, "(-5) - 6 = n " Then if player B, draw (Red) 4 and (Black) 5, then the number sentence is "(-4) - 5 = n Each correct answer is equivalent to one point. When the timer goes off, each player should count the total points they got. The player with the most points wins. For the advanced students, they can draw 3 cards instead of 2 and write them on the activity sheet. * A word file is provided so teachers can edit the equations. ​ ​

Preview	{If your activity does not have worksheets you can delete this table}
Activity Sheet 1	Activity Sheet 2
Fruit Playing Cards	Answer Key