This Grade 3 subtraction pack is the second in a complete CPA-based math mastery series for Grade 3. Designed around a friendly robot guide to do a visual example of each activity, each worksheet helps children understand how to use number bonds to subtract 1-digit numbers from 3-digit numbers without exchange. Students learn that if 4-1=3, then 254-1=253, using base ten blocks, place value arrow cards, place value grids, place value abacus, and cherry diagrams to develop a secure understanding