I Have, Who Has? Counting by 10s

One of our new games that we play during math time is "I Have, Who Has?" counting by 10s! The person who has the "10" card starts by saying "I have 10, (then they flip their card over and say) "who has 20?" the person who has 20 would say "I have 20 (then they flip their card over and say) "who has 30?" etc, etc.