Step 1 / 2

Count the tens

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Steps in this unit · Tens up to 90

Tens up to 90 · Numbers & Operations

See 60, 70, 80 and 90 with blocks, and learn their names.

This is step 1 of unit 24, “Tens up to 90”, 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.