8.EE.C.8 Grade 8 · Expressions and EquationsAnalyze and solve pairs of simultaneous linear equations.Common Core State Standards for Mathematics, as adopted in the Massachusetts Curriculum Framework for Mathematics (2017), Grade 8.
Play the game: Balancefree, 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.
8.EE.A.1Integer exponents: count down the powers so 3⁰ = 1 and 3⁻¹ = 1/3; 3² × 3⁻⁵ = 3⁻³8.EE.A.2Square roots and cube roots of small perfect squares and cubes8.EE.A.3Estimate huge and tiny things as one digit × a power of 10, and how many times as much8.EE.A.4Scientific notation: multiply and divide, read calculator E, choose units; sunlight takes 5 × 10² s8.EE.B.5Graph it: the unit rate is the slope; compare two rates8.EE.B.6Similar triangles: the same slope between any two points; y = mx + b8.EE.C.7Equations with x on both sides: one, none or infinitely many answersColorMyMath · 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.