Tyler looked at the numbers 10,020 and 20,010. His thinking is shown below. The number 10,020 has more tens than 20,010 because 10,020 has 2 in the tens place, and 20,010 has 1 in the tens place. 2 tens is more than 1 ten. Tell why Tyler’s thinking is incorrect. Then explain why there are more tens in 20,010 than in 10,020. Show your work. Use a place-value chart, words, and numbers to explain your answer.
What is a proportion?