To write 4-digit numbers in standard form, put a comma between the digit in the thousands place and the digit in the hundreds place.
The comma makes it easier to read, write, and remember the number.
Read 4-digit numbers by saying the number of thousands, then the 3-digit number that is after the comma.
2,083 = two thousand, eighty-three
42,315 = forty-two thousand, three hundred fifteen
Comma placement is every 3 digits counted from the ones place.
The comma helps you separate big numbers into chunks. Numbers in the millions have 2 commas!
What number comes after 2,999?
What the number ‘five thousand, twenty-seven’ in standard form.
The counter didn’t roll over to a new hundred!
They counted from 36,399 to 36,300 instead of from 36,399 to 36,400. You can tell it is wrong because the number after 36,399 should be greater than 36,399.