This file contains 33 pages to practice CC1.OA.B.4. These pages include 16 printable activity sheets to use as guided practice, independent work or homework. This activity book also includes cut and paste activities and open ended pages for children to make themselves, along with playing cards that can be used to play three different ways during math centers and an open ended game board.
I have used this in my own classroom.
CC1.OA.B.4 - Understand subtraction as an unknown-addend problem. For example, subtract 10 – 8 by finding the number that makes 10 when added to 8.