Doubles, Doubles +1, Doubles –1

The object of this game is to write number sentences to show doubles, doubles +1, or doubles –1 and to predict whether the sum will be odd or even. This is a game for two players.

Materials

• Number Spinner (1–10) and Doubles Spinner from the Student Activity Book
• Clear plastic spinner or a pencil and paper clip
• 25 connecting cubes
• Doubles, Doubles +1, Doubles –1 Recording Sheet from the Student Activity Book

Directions

1. Player 1 spins the Number Spinner and the Doubles Spinner. For example, Player 1 spins a 7 and Doubles –1.
   • Use the spins to write a number sentence and
     predict whether the sum is odd or even. Find
     the sum and circle whether the sum is even or
     odd. Record your work on the recording sheet.
   
2. Player 2 checks Player 1’s work and places a ✔ in Player 1’s last column if the prediction is correct.
3. Player 2 now spins, makes a prediction, and completes the next row on the recording sheet.
4. Players continue to take turns for five rounds.
5. The player with the most correct predictions wins.