Subitizing Numbers

What is subitizing?  Simply put, subitizing is the ability to recognize a small group of objects without counting. It is a fundamental skill in the development of number concepts.  We've been working really hard at knowing our numbers 1-10 and for some 1-20 without having to count every single picture, tally group, or ten frame.  It's important to learn and recognize number groups- 5 & 5 make 10, 3 & 2 make 5, 10 & 10 make 20, etc.  This is the basis of addition and subtraction.  Several of us are still counting each item to figure out how many it is.  We're working hard at learning what each side of dice are without counting the dots, of recognizing bundles of 5 in tally marks and adding on, and figuring out our 10 frames.

We've been working on this through our 5 in a line game.  It's similar to BINGO but our cards are ten frames.  We have to find the correct digit to match the ten frame picture.  We've also been playing MEMORY games with tally marks, ten frames, and digits.  Our Math Journals have been cutting out the digits and matching them with the correct 10 or 20 frame pictures.