Stage 2 · Unit 19 / 44 · Numbers & Operations
Counting in tens
See how many tens there are to know 20, 30, 40 and 50, and learn their names.
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Count the tens
Three tens make 30.
Say the tens (1)
· Not the suggested orderSay the tens (2)
In Korean, 20 is seumul, 30 is seoreun, 40 is maheun, 50 is swin.
· Not the suggested orderAbout Counting in tens practice
“Counting in tens” is unit 19 of Stage 2, for ages 7–8, in numbers & operations. See how many tens there are to know 20, 30, 40 and 50, and learn their names.
Its steps are: Count the tens, Say the tens (1), Say the tens (2). Each step has 10 problems and is free with no sign-up. 90% or better earns three stars.