This week, your student will add and subtract numbers using what they know about the meaning of the digits.

In earlier grades, your student learned that the 2 in 207.5 represents 2 hundreds, the 7 represents 7 ones, and the 5 represents 5 tenths. We add and subtract the digits that correspond to the same units, like hundreds or tenths. For example, to find , we add the tens, the ones, and the tenths separately, so: