It's helpful when you're adding two-digit or three-digit numbers together ... First, let's look at 237. This number has 2 hundreds, 3 tens and 7 ones. The number 25 has 2 tens and 5 ones.

When a number is made up of more than one digit ... 2 packets of pencils to the tens column and 5 marbles to the ones column. Now let's add the second number to the place value chart. 33 has 3 ...