Subtraction Facts Author:The Learning Line Subtraction Facts — 2-digit numbers — Grades 2-3 — Practice Makes Learning Last! — It takes practice to master any skill. The activities in this book provide practive for the skills listed: — -- practice subtraction facts through 18 — -- check subtraction by adding — -- proof for errors — -- subtract 2- and 3-digit numbers without borrowing — -- solve wo... more »rd problems.« less