Grade 1 Math · Subtraction Within 20
Build subtraction fluency with five 10-question practice tests covering counting back, missing numbers, differences, and simple word problems.
These Grade 1 math practice tests help students subtract within 20 using counting back, related addition facts, breaking apart numbers, missing-number equations, and simple story problems. Each mini test contains 10 multiple-choice questions with answers and explanations.
Complete one 10-question test at a time. Encourage students to draw counters, use a number line, or connect subtraction to an addition fact when a difference is difficult. Open the solution after answering, then explain the strategy before moving to the next test.
For more Grade 1 math practice, return to the Grade 1 Math category.
1. Test
A 10-question Grade 1 practice test on subtraction within 20, with answers and explanations.
Choose one answer for each question. Open the solution after answering to see the correct answer and explanation.
Please select an answer first.
Correct answer: A
The correct answer is 5.
Start at 8 and count back 3: 7, 6, 5. So 8 - 3 = 5.
Please select an answer first.
Correct answer: B
The correct answer is 5.
Take away 4 from 9: 8, 7, 6, 5.
Please select an answer first.
Correct answer: C
The correct answer is 7 - 2.
7 take away 2 leaves 5.
Please select an answer first.
Correct answer: D
The correct answer is 4.
Count back six from 10: 9, 8, 7, 6, 5, 4.
Please select an answer first.
Correct answer: A
The correct answer is 5.
One less than 6 is 5.
Please select an answer first.
Correct answer: B
The correct answer is 0.
Taking away all 5 objects leaves 0.
Please select an answer first.
Correct answer: C
The correct answer is 8.
Two less than 10 is 8.
Please select an answer first.
Correct answer: D
The correct answer is 2.
Count back seven from 9 to reach 2.
Please select an answer first.
Correct answer: A
The correct answer is 4 - 2.
4 take away 2 equals 2.
Please select an answer first.
Correct answer: B
The correct answer is 7.
One less than 8 is 7.
It means finding the difference when one number is taken away from another, with the starting number no greater than 20. Students practice facts such as 14 - 6 and 19 - 9.
Each mini test contains 10 multiple-choice questions. The complete page includes five mini tests and 50 questions in total.
Use counters, drawings, or a number line to show the starting amount and the amount taken away. Students can also use a related addition fact to check the difference.
