Dino Eggs | Decomposing Teen Numbers Game

Dino Eggs -A prehistoric adventure that makes learning math a blast! Our cute baby dinos need your help to hatch. In this exciting game, your task is to decompose teen numbers correctly to help them break free from their eggs. Decomposing numbers may sound tricky, but it's just a fancy way of saying that you're breaking numbers down into smaller parts. For teen numbers, you're looking at how many tens and how many ones make up that number. By understanding this, you'll have a better grasp of how numbers work, which will be super helpful as you learn more advanced math in the future. With each correct answer, a baby dino is set free! Not only will you be learning a vital math skill, but you'll also be helping our dino friends. Are you ready to take on this challenge and start decomposing teen numbers? The baby dinosaurs can't wait to meet you!

Common Core Standards

Compose and decompose numbers from 11 to 19 into ten ones and some further ones, e.g., by using objects or drawings, and record each composition or decomposition by a drawing or equation (e.g., 18 = 10 + 8); understand that these numbers are composed of ten ones and one, two, three, four, five, six, seven, eight, or nine ones.


Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).