Numbers 1–20 Flashcards — Complete Number Mastery
All twenty essential numbers! These free printable 1-20 flashcards extend basic counting through the teen numbers for children aged 4+. The teen numbers (11-19) are notoriously tricky because their names don't follow a transparent pattern — "eleven" and "twelve" are entirely irregular, while "thirteen" through "nineteen" reverse the ones-before-tens pattern of higher numbers.
Conquering the Tricky Teens
The teen numbers trip up many children because "fourteen" puts the four before the ten, while when writing the numeral, the one (ten) comes before the four. This reversed verbal-written order is unique to teens and causes persistent confusion. These flashcards provide the repeated exposure needed to make teen number recognition automatic despite their irregularity.
Teen Number Activities
Order all 20 cards on a number line. Our counting worksheets extend to counting practice. Try number word tracing 1-20. Use math worksheets with teen numbers. Pair with addition facts flashcards for operations.
Twenty and Beyond at LearnySprout
Explore all math flashcard sets. Try mazes, patterns, and coloring. LearnySprout's handwriting generator creates custom number sheets. Everything at LearnySprout is free!
