The problem is the number 913,256. If we work from 6 over, we know that the #’s are in the following places: 6 is in the ones, 5 is in the tens, 2 is in the hundreds, 3 is in the thousands, 1 is in the ten thousands, and lastly, 9 is in the hundred thousand spot.
Kids are taught to group these numbers. Therefore, the one spot, ten spot, and hundred spot are called Ones period. On the other hand, the thousands, ten thousand, and hundred thousand are grouped in the Thousands Period. A period is three digits’ each group in a number.