Weigh-In Pairs

The gym scale only weighs two balls at a time. Use the pair readings to figure out what every ball weighs, with live needles that show when your numbers match each scale. Four levels from Rookie (grades 3–4) to MVP (grade 8), with hints that show each worked step.

OAS 3.A.2.1 · 4.A.2.2 · 5.A.2.2 · 6.A.3.2 · 7.A.3.1 · PA.A.4.1

Common Core: 3.OA.D.8 · 4.OA.A.3 · 5.OA.A.2 · 6.EE.B.7 · 7.EE.B.4a · 8.EE.C.8b–c

Grades 3–8 · Runs in any web browser · No student logins · Works offline

Download includes the game file and a Quick Start PDF.