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Tens and ones to 99 · Numbers & Operations

Grouping in tens makes big amounts easy. Show numbers to 99 as tens and ones.

This is step 2 of unit 25, “Tens and ones to 99”, 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.