North Carolina Standard Course of Study
NC.2.NBT. Number and Operations in Base Ten
Understand place value.
NC.2.NBT.1. Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones.
NC.2.NBT.1.a. Unitize by making a hundred from a collection of ten tens.
NC.2.NBT.1.b. Demonstrate that the numbers 100, 200, 300, 400, 500, 600, 700, 800, 900 refer to one, two, three, four, five, six, seven, eight, or nine hundreds, with 0 tens and 0 ones.