Word problems with one addend unknown - up to 20
Free printable Grade 1 math worksheet for "Word problems with one addend unknown - up to 20" — practice addition and subtraction word problems up to 20. No-prep, print or assign online.
This worksheet provides grade 1 students with medium difficulty word problems focused on addition and subtraction where one addend is unknown, with numbers up to 20. Teachers can use this resource to reinforce students' understanding of number relationships and develop their critical thinking skills in solving real-life math problems. It supports differentiated instruction by offering practice in identifying missing addends and strengthens foundational arithmetic skills.
Learning objectives
- Solve addition and subtraction word problems with one addend unknown up to 20
- Identify the missing number in a number sentence within 20
- Apply problem-solving strategies to find unknown addends in contextual scenarios
How to use this worksheet
- Click “Download Worksheet” to get the PDF — free with a KiwiBee account (up to 25 downloads a month).
- Print at home or in class for Grade 1; it's no-prep, with no extra materials needed.
- Hand it out as classwork, homework, or a quick warm-up.
Frequently asked questions
Is the “Word problems with one addend unknown - up to 20” worksheet free?
Yes. “Word problems with one addend unknown - up to 20” is a free printable Math worksheet. Sign in with a free KiwiBee account to download the PDF — it includes up to 25 downloads a month.
What grade or age is this Math worksheet for?
It's designed for Grade 1 (ages 6–7), covering Addition and subtraction word problems up to 20.
Do I need to prep anything?
No. It's a no-prep, print-and-go worksheet — just download and hand it out.
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