round up to The nearest ten's number

Hi this is my working on explain everything i have been learning about rounding up to the Teens number i hope i like it.

fun facts olympics

1. n the 1900 paris olympics their prizes was money.
2. The one event held in was a 600 meter running race.
3. The youngest person to win was a 10 year old boy Dimitrios Loundras named  who was a gymnast who won a bronze medal.
4. The oldest was a man named Oscar Swahn  who was a shooter from Swedan he did not win any medals
5. Women started in the olympics in 1900 in Paris.
6. The USA have won the most medals they have a total of 2,406.
7. Abebe Bikila  won the gold medal in 1960 for running barefoot.