Subtracting 1, 10, or 100
cc-early-math-add-sub-1000--cc-early-math-sub-ones-tens-hundreds--subtracting-hundreds-and-tens
Addition and subtraction within 1000
Subtracting 1s, 10s, and 100s
Sal subtracts 1, 10, or 100 from a number.
Sal subtracts 1, 10, or 100 from a number.