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Say the tens (1)
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Counting in tens · Numbers & Operations
See how many tens there are to know 20, 30, 40 and 50, and learn their names.
This is step 2 of unit 19, “Counting in tens”, 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.