This grade 1 subtraction within 20 quiz asks 10 multiple-choice questions on subtraction within 20, and each answer comes with a short explanation.
This quick quiz has 10 multiple-choice questions on subtracting within 20. It covers differences, counting back, missing parts, fact families, and story problems. Choose one answer for each question, then read the explanation to learn the idea behind it.
🎉 Quiz complete!
How does this quiz work?
Read each question, choose one answer among A, B, C and D, then check it: a short explanation appears after every answer. Your score out of 10 is shown at the end, and you can restart the quiz as often as you like.
What should you review before the quiz?
Reread the key facts of the lesson and the worked example. If a question is hard, go back to the matching part of the lesson, then try the quiz again. Write your work on scrap paper: most mistakes come from skipping a step, not from the idea itself.
Remember:
- Subtraction means taking away, like \(8-3=5\). The answer is the difference.
- Counting back: start at the first number and count down the second number.
- Think addition: \(13-8\) asks \(8+\text{ ? }=13\). The missing part is 5.
- To compare, match the groups. The extra objects show how many more or fewer.
- A fact family uses three numbers in four sentences, like 6, 9, and 15.
How to use this grade 1 subtraction within 20 quiz
Retake this grade 1 subtraction within 20 quiz until every answer is right, then move on to the worksheet and the test.
See every chapter on the Grade 1 math page.