Addition up to three digits: fill in the missing digits
Free printable Grade 3 math worksheet for "Addition up to three digits: fill in the missing digits" — practice addition: three digits. No-prep, print or assign online.
This worksheet provides practice in three-digit addition by requiring students to fill in missing digits to complete sums correctly. Teachers can use it to reinforce place value concepts and improve students' problem-solving skills in addition. Ideal for Grade 3 classrooms, it supports mastery of addition up to three digits with a medium difficulty level.
Learning objectives
- Solve addition problems involving three-digit numbers with missing digits.
- Apply place value understanding to identify and fill in missing digits in addition equations.
- Demonstrate accuracy in multi-digit addition by completing incomplete number sentences.
Answer Key
How to use this worksheet
- Click “Download Worksheet” to get the PDF — free with a KiwiBee account (up to 50 downloads a month).
- Print at home or in class for Grade 3; it's no-prep, with no extra materials needed.
- Use the included answer key to mark it in seconds.
Frequently asked questions
Is the “Addition up to three digits: fill in the missing digits” worksheet free?
Yes. “Addition up to three digits: fill in the missing digits” is a free printable Math worksheet. Sign in with a free KiwiBee account to download the PDF — it includes up to 50 downloads a month.
What grade or age is this Math worksheet for?
It's designed for Grade 3 (ages 8–9), covering Addition: three digits.
Does it come with an answer key?
Yes — a matching answer key is included so you can grade it in seconds.
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