Answer:
he put 675,981,012,230 above 675,981,120,231 which is wrong because the first one is less than the second. He could look at the different place values until he sees one is higher and make sure he puts them in the correct order.
Step-by-step explanation:
You have to look at each number from left to right until you see which number has a higher number than the other and if its higher it means its more than the other number.
