Free printable practice
Missing Addends 2 Digit Plus 1 Digit Practice Activities
Printable maths drills for finding the missing number in 2-digit plus 1-digit addition facts.
Practice that builds confidence
Understanding the missing addend
These printable activities help children practise missing addends in 2-digit plus 1-digit addition, such as 34 + __ = 39 or __ + 6 = 47. Children learn that the blank is not a guess; it is the number that makes the whole equation true.
The worksheets include clear addition drills from the Mathematics > Math Drills > Addition section, with varied layouts so learners can build fluency, check relationships between numbers, and become more confident with mental addition and subtraction.
A missing addend question shows an addition equation with one part hidden. In 2-digit plus 1-digit practice, children work with a larger number and a small one-digit part. They may see the blank before or after the plus sign, so they must read the full equation instead of simply adding the visible numbers.
Skill progression in these drills
The practice moves children from straightforward number facts to equations that need careful thinking across the ones place. Learners compare the starting 2-digit number and the total, or use the known one-digit addend to find the missing 2-digit number. This strengthens place value, number bonds, counting on, and the link between addition and subtraction.
A simple parent routine
At home, ask your child to read one equation aloud: “36 plus what equals 42?” Let them count on from 36 to 42 using fingers, a number line, or small objects, then write the missing number. After a few questions, ask, “How can you check it?” The child should put the answer back into the blank and add again. This quick check builds accuracy without turning the activity into memorisation only.
Classroom uses for teachers
Teachers can use these pages for daily maths warm-ups, addition revision, small-group remediation, or independent practice after a lesson on related facts. They also work well in maths centres where children explain their method to a partner: count on, subtract, or use a known number bond. The varied blank positions help teachers spot whether pupils understand equations or are following a fixed pattern.
Common errors to watch for
Some children add the two visible numbers even when the total is already shown. Others confuse the missing addend with the answer, especially in equations like __ + 5 = 68. Watch for counting errors when bridging to the next ten, reversed digits in 2-digit numbers, and forgetting that a one-digit missing addend must fit the equation exactly.
Free printable PDF download
Use this missing addends 2 digit plus 1 digit worksheet page to preview the activity, print it, or download it as a PDF for quick practice. It works well for homework, homeschool lessons, tutoring, morning work, revision, and classroom centers.
Answers and answer key support
After the child completes the worksheet independently, parents and teachers can use the answer support or answer key information to check the work, review mistakes, and choose the next practice step.
Why iBloom worksheets help
iBloom worksheets keep the focus on one precise addition skill: finding the unknown part in 2-digit plus 1-digit equations. The uncluttered format supports repeated practice, while the changing equation forms encourage real reasoning. A child-friendly strategy is: read the equation, circle the total, count up from the known part, write the missing number, then check by adding.
Helpful answers
Frequently asked questions
What does missing addend mean in these worksheets?
A missing addend is the blank part of an addition equation. For example, in 28 + __ = 35, the child finds the number that must be added to 28 to make 35.
Are these worksheets only for 2-digit plus 1-digit addition?
Yes. The practice is focused on equations involving a 2-digit number and a 1-digit number, so children can build fluency with this specific addition skill.
Should children use subtraction to solve the blanks?
They can. Counting on is useful at first, but children should gradually see that subtraction checks the missing part, such as 42 - 36 = 6 for 36 + __ = 42.
Which children will benefit most from this practice?
These worksheets are useful for children in early primary classes who already know basic addition and are ready to work with 2-digit numbers, one-digit addends, and simple equations.
How can I help if my child keeps adding the visible numbers?
Ask your child to circle the total first and say the equation in words. This helps them notice whether they need to find a missing part instead of adding every number they can see.
Is this missing addends 2 digit plus 1 digit worksheet free?
Yes. You can preview it for free and use the printable worksheet for home or classroom practice.
Can I download this missing addends 2 digit plus 1 digit worksheet as a PDF?
Yes. Use the worksheet download option to save a printable PDF, or print the worksheet directly from the page.
Does this missing addends 2 digit plus 1 digit worksheet include answers or an answer key?
When the activity has fixed answers, iBloom includes answer support so parents and teachers can check the completed worksheet.