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.
3. 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 6.
10 take away 6 equals 4.
Please select an answer first.
Correct answer: B
The correct answer is 13.
13 take away 5 equals 8.
Please select an answer first.
Correct answer: C
The correct answer is 14 - 6 = 8.
14 take away 6 is 8, so this equation is true.
Please select an answer first.
Correct answer: D
The correct answer is 8.
20 take away 8 equals 12.
Please select an answer first.
Correct answer: A
The correct answer is 13 - 3 - 2.
Break 5 into 3 and 2. Taking away 3 and then 2 is still taking away 5, leaving 8.
Please select an answer first.
Correct answer: B
The correct answer is 7.
The part left after taking away 10 from 17 is 7.
Please select an answer first.
Correct answer: C
The correct answer is 13 - 5.
Both 12 - 4 and 13 - 5 equal 8.
Please select an answer first.
Correct answer: D
The correct answer is 3.
Count back 8 from 11 to reach 3.
Please select an answer first.
Correct answer: A
The correct answer is 15.
15 take away 9 equals 6.
Please select an answer first.
Correct answer: B
The correct answer is 13.
20 take away 7 leaves 13.
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.
