Math · Kindergarten · Subtraction Springs
Subtract within 20
Practise subtract within 20 in TernQuest →What is “Subtract within 20”?
Subtract within 20 is a Kindergarten math skill in the Subtraction Springs region of the TernQuest map — subtract within 10, then within 20. It is aligned to California Common Core standard 1.OA.6. Children work through 26 grade-tagged questions at the recall level (quick recall), and Pip the tern offers a hint — never the answer — when they get stuck.
How does it unlock?
Skills on the map unlock in order: finishing the skill before this one with a mastery score of 60 or more opens subtract within 20. A grown-up can also assign it directly from the dashboard, and teachers can assign it to a whole class with a join code.