Missing value

★★★Not the suggested order

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Steps in this unit · Averages

1 2 3

← Average of four All four operations →

Averages · Data & Probability

Find the average of a set, and find a missing value from a known average.

This is step 3 of unit 6, “Averages”, in Stage 6: Factors, common denominators, multiplying fractions and decimals, area (ages 12). A round has 10 problems; 90% or better earns three stars. Everything is free with no sign-up, and your stars and XP are saved on this device.