Step 1 / 4
Count by tens
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Numbers to 100 · Numbers & Operations
Count by tens, tell tens from ones, and compare two-digit numbers.
This is step 1 of unit 3, “Numbers to 100”, in Stage 2: Carrying, borrowing and numbers to 100 (ages 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.