Illustrative MathematicsVaries

This task highlights an important part of 2.NBT.4 that previous standards often underemphasized: namely, the boldface words emphasized here: Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of comparisons. The comparisons here involve sums and differences - not primarily to provide an opportunity to calculate, but rather in order to stimulate students' thinking about the magnitudes of the base-ten units of which numbers are composed.