Addition & Subtraction Flashcards: Within 20
240 flashcards, built on the spaced-repetition method.
Ages 6+. 10 min a day.
Long-term retention
Zero screen time
A screen-free fluency system for addition and subtraction facts within 20, designed to make every fact automatic. Every card pairs an addition or subtraction fact with a visual model, so your child sees why the answer works, not just memorizes it.
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- 240 cards: Every addition and subtraction fact within 20. Color-coded by operation and range, so your child can start anywhere and mix as they go.
- Workbook: 40 worksheets of addition and subtraction questions in mixed formats. Deep practice across every fact.
- Answer key: Your child catches mistakes on the spot. Practice doesn't wait on you.
- Daily tracker: Tells your child what to practice each day. No "what now?" decisions.
- Parent Guide: Everything you need to know to get started.
- 5 review levels: Cards move between levels based on your child's answers, so practice focuses on what they don't know yet.
Peek inside the deck
Everything from a first 3 + 2 to a tricky 17 − 8.
Tap a card to flip it.
Addition & subtraction, 4 ways
Four ways your child sees the answer take shape.
- Follow the tracker. It tells which levels to practice each day.
- One-time setup. Place all the cards according to the instructions.
- Review the cards. Pick a card, answer the question. Right answers advance; tricky ones cycle back. A session ends when all cards for that day have been reviewed.
- Mastery. Cards graduate to MASTERED once they've cleared all 5 levels. When all 240 facts are there, your child has every addition and subtraction fact within 20 at instant recall.
Each deck uses the Leitner System, a proven method based on cognitive science that helps your child's brain move facts from short-term to long-term memory efficiently. This system:
- Adapts to your child's learning pace. Cards they know well appear less frequently.
- Focuses time where it's needed. Challenging facts get more practice automatically.
- Builds lasting retention. Facts learned this way stick for years, not weeks.
- Prevents overwhelm. Your child practices just the right amount each day.
Customer Reviews
Frequently Asked Questions
What grade is CueCards Addition & Subtraction for?
Best fit is Grades 1 through 2 (ages 6 to 7). Younger children (ages 4 to 5) can make a great start with the facts within 5 and within 10, and older children can use the deck to rebuild fluency. If your child is just starting out, plan to sit with them for the first few days until the routine takes hold.
Which facts should my child start with?
All 240 cards work as one deck. Your child picks at random, and the 5-level system handles which cards come back when.
The color-coded ranges let you match the starting point to your child: children just starting can begin with facts within 5, then add within 10 and within 20 as they progress, while older children can use the full deck from day one. Cards your child already knows will move up quickly, so practice focuses on what's still new.
My child is just learning to add and subtract. Is this too advanced?
No. Every card carries a visual that shows how to reach the answer. The cards teach as they test, so start with facts within 5 and grow into within 10 and 20 as your child is ready.