Addition within 10, 20 & 100 Quiz
About this quiz
Add two numbers whose sum stays within 10, 20, or 100, from basic facts up to two-digit sums.
- Choose a limit of 10, 20, or 100 (20 by default), and whether 0 can appear.
- Answer 10, 20, or 30 flash cards, one at a time, while a timer runs.
- At the end, review your score, time, and every mistake, then practice just the cards you missed.
- For Grades 1–2 · Common Core 1.OA.C.6, 2.OA.B.2, 2.NBT.B.5
Worked example
8 + 7 = 15
Make ten: 8 + 2 = 10, then add the other 5 to get 15.
Tip: Start from the bigger number and count on, or use a double you know, such as 7 + 7 = 14.
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