Stage 2 · Unit 24 / 44 · Numbers & Operations
Tens up to 90
See 60, 70, 80 and 90 with blocks, and learn their names.
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Count the tens
Say the tens
In Korean, 60 is yesun, 70 is ilheun, 80 is yeodeun, 90 is aheun.
· Not the suggested orderAbout Tens up to 90 practice
“Tens up to 90” is unit 24 of Stage 2, for ages 7–8, in numbers & operations. See 60, 70, 80 and 90 with blocks, and learn their names.
Its steps are: Count the tens, Say the tens. Each step has 10 problems and is free with no sign-up. 90% or better earns three stars.