Mixed add and subtract

Three-digit add and subtract · Numbers & Operations

Add and subtract three-digit numbers, then mixed expressions.

This is step 3 of unit 1, “Three-digit add and subtract”, in Stage 4: Multiplying, dividing and first fractions (ages 10). 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.