# Online Games at PrimaryGames.com

Description: Practice addition skills with sums up to 20 in this fun puzzle game.

Instructions: Solve each addtion problem then drag the puzzle piece to the correct answer.

Category: Math Games

Note: This game was built with HTML5. It runs on Chrome, Firefox, Opera, Safari or Internet Explorer 9 or higher. It is also optimized for iOS devices, including iPad, iPod, and iPhone.

Common Core State Standards: CCSS.MATH.CONTENT.1.OA.C.6 - 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).

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