K.OA.A.2 Kindergarten · Operations and Algebraic ThinkingSolve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.Common Core State Standards for Mathematics, as adopted in the Massachusetts Curriculum Framework for Mathematics (2017), Kindergarten.
Play the game: Story Problemsfree, no sign-up →Addition is a length — dots laid end to end on the number line. Taking away comes down the same line. Every fact is shown as a picture before it is ever asked for from memory.
Every page is free and open — nothing to install, no account, and it works on a phone or a classroom board. Every number has its own color: 1 red, 2 orange, 3 yellow, 4 green, 5 blue, 6 purple, 7 brown, 8 pink, 9 cyan, and a number is that many colored dots.
K.OA.A.1Show addition and subtraction with objects, fingers, drawings, sounds and actionsK.OA.A.3Break numbers up to 10 into pairs in more than one way (5 = 2 + 3 = 4 + 1)K.OA.A.4For any number 1 to 9, find the number that makes 10K.OA.A.5Add and subtract within 5 fluentlyColorMyMath · getridoftheteacher.com · every number has its own color, and a number is that many colored dots. Matching a game to a standard is a judgement call; the official text is at doe.mass.edu.