Super Hero Battle is a fun way to practice adding tens to a 2 digit number. This covers the common core standard 1.NBT.4. The game is played like the game of war. Divide the cards up evenly. Each player puts one card down. Each player adds the tens and whoever has the biggest number wins all the cards. Continue until all the cards are played. The player with the most cards wins.
This game is also included in a bundle.
Adding Tens to a 2 Digit Number Bundle
I also have games for subtracting tens from a 2 digit number.
Subtracting Tens from a 2 Digit Number Bundle