Interactive Notebook - Representing numbers to 20 in different ways! Subitizing helps students recognize numbers that are represented in different ways quickly. Your students will love this resource! It includes Valentine’s themed subitizing pictures {cut-n-paste} in black-n-white for students to represent numbers to 20. Activities for numbers 1 through 7 include colored picture directions. Answer key is provided for each subitizing activity included. What you need: In addition to printing