Adding 1s, 10s, and 100s
cc-early-math-add-sub-1000--cc-early-math-add-ones-tens-hundreds--adding-hundreds-tens-and-ones
Addition and subtraction within 1000
Adding 1s, 10s, and 100s
Sal adds 3-digit numbers by adding ones, tens, and hundreds.
Sal adds 3-digit numbers by adding ones, tens, and hundreds.