On the signal to begin players find someone else to play with.

Each player holds out their cards, face down, in front of them.

Each player takes a card from their partner and they simultaneously flip their cards face up.

 The first player who adds up (or could do multiplication, or subtraction with a positive number, or subtraction with a negative number) keeps both cards and does five high jumps.

The one who lost does five jumping jacks.

Both players find a new partner to challenge.