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Add and subtract within 20

Build confidence with quick addition and subtraction facts up to 20. This mixed-difficulty quiz helps kids practice counting on, making ten, and spotting number patterns. Choose how many questions you...

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101 questions
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About this quiz

What you’ll practice

Adding and subtracting within 20 is a key step toward stronger mental math and smoother work with bigger numbers later. This quiz mixes simple facts with slightly trickier ones so you can improve without getting stuck.

Each question has 4 answer options and there’s no timer, so players can think carefully, use strategies, and learn from mistakes.

Difficulty and question settings

You can choose your question count before you start, and you can also select a difficulty level (easy, medium, hard, or mixed). Mixed mode balances the challenge by blending straightforward facts (like 6+3) with problems that require a strategy (like 13−8).

Common pitfalls to avoid

Many errors come from rushing, mixing up + and − signs, or losing track when counting back. Slow down, check the operation, and use a consistent method.

  • Watch the sign: addition and subtraction look similar when you’re moving fast
  • Use “make 10” (8+7 = 8+2+5) to reduce counting
  • For subtraction, count up from the smaller number to the bigger number when it feels easier
  • Double-check teen numbers (11–19) to avoid digit swaps
  • If you guess, pause and estimate whether the answer makes sense

Tips to improve quickly

Try a short set each day, then increase the question count as you get more accurate. When you miss a problem, redo it using a different strategy (number line, counting on/back, or making ten) to lock it in.

Sample questions

What is 7 + 6?

  • A.13
  • B.12
  • C.14
  • D.15

What is 3 + 4?

  • A.7
  • B.6
  • C.8
  • D.5

What is 2 + 3?

  • A.5
  • B.4
  • C.6
  • D.3

Quiz FAQ

How many questions are in this quiz?

This quiz has 101 questions focused on adding and subtracting within 20.

Is this quiz timed?

No. There’s no timer, so you can work at your own pace and focus on accuracy.

What answer format does the quiz use?

Each question is multiple-choice with 4 options, and you pick the one correct answer.

Can I choose the difficulty level?

Yes. Pick easy, medium, hard, or mixed difficulty before starting to match your skill level.

What math skills will I practice here?

You’ll practice addition and subtraction facts within 20, including strategies like counting on/back and making ten.

Play this quiz in another language(7)

sk
Sčítanie a odčítanie do 20Slovenčina
cs
Sčítání a odčítání do 20Čeština
de
Addieren und subtrahieren bis 20Deutsch
es
Suma y resta dentro de 20Español
pl
Dodawanie i odejmowanie w zakresie 20Polski
hu
Add és vonj ki 20-on belülMagyar

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