6.EE.C.9 Grade 6 · Expressions and EquationsUse variables to represent two quantities in a real-world problem that change in relationship to one another; write an equation to express one quantity, thought of as the dependent variable, in terms of the other quantity, thought of as…Common Core State Standards for Mathematics, as adopted in the Massachusetts Curriculum Framework for Mathematics (2017), Grade 6.
Play the game: Letters for Numbersfree, no sign-up →Letters stand for quantities you can still picture. A balance stays level, a function machine shows what it did, and doubling grows as a shape you can watch.
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.
6.EE.A.1Whole-number exponents (5 squared, 2 to the 10th)6.EE.A.2Letters stand for numbers: write, evaluate and name the parts of 2n + 36.EE.A.3Use the distributive property to write equivalent expressions6.EE.A.4Equivalent expressions: put numbers in and see the dots match every time6.EE.B.5Which values from a set make an equation or inequality true: test each one6.EE.B.6Write an expression for a story; say what the letter stands for6.EE.B.7Solve x + p = q and px = q on a balance scale6.EE.B.8Write x > c or x < c; infinitely many answers, drawn on a number lineColorMyMath · 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.