5.OA.A.2 Grade 5 · Operations and Algebraic ThinkingWrite simple expressions that record calculations with numbers, and interpret numerical expressions without evaluating them.Common Core State Standards for Mathematics, as adopted in the Massachusetts Curriculum Framework for Mathematics (2017), Grade 5.
Play the game: Letters for Numbersfree, 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.
5.OA.A.1Brackets first: the bracketed group is a box of dots made before the rest5.OA.B.3Two patterns from two rules: compare them and graph the pairsColorMyMath · 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.