K.OA.A.5 Kindergarten · Operations and Algebraic ThinkingFluently add and subtract within 5, including zero.Common Core State Standards for Mathematics, as adopted in the Massachusetts Curriculum Framework for Mathematics (2017), Kindergarten.
Play the game: One More, One LessStep 1 of the ColorMyMath curriculum · free, 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.
Step 1Adding 1 up to 5: counting to 5Step 2Subtracting 1 from 5 to 0: counting back from 5Step 3Making 2, 3, 4: 1+1, 1+2, 2+2, 3+1Step 5Making 5: 4+1, 3+2K.OA.A.1Show addition and subtraction with objects, fingers, drawings, sounds and actionsK.OA.A.2Add and take away word problems within 10K.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 10ColorMyMath · 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.