When we look at a two-digit number, we see a ones place and a tens place (also called ones column and tens column). We can use these digits to find the parts that make up the number.
Look at the number 53. The ones place has a 3. In other words, there are three ones in this number. The tens place has a 5, so there are five tens in this number. Five tens equal 50.
We can use place value addition to write this number in a new way. Our tens value is 50, and our ones value is 3. We add these numbers together to equal 53. So, 50 + 3 = 53.
Let's look at another number: 26. We have a 6 in the ones place, or six ones. We have a 2 in the tens place, or two tens, which equals 20. The place-value addition for 26 is 20 plus 6.
Sometimes we can figure out the place-value addition simply by the name of the number. For instance, eighty-two is eighty plus two. Thirty-seven is thirty plus seven. This method does not always work, though. What about the number 15? Let's look at place value again. There are five ones. There is one ten. So our place value addition is 10 + 5 = 15.
