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Join numbers
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Join two parts · Numbers & Operations
Put two groups together to feel what adding means.
This is step 2 of unit 9, “Join two parts”, in Stage 2: Numbers to 100, carrying and borrowing (ages 7–8). 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.