KiwiBee printable
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” and sign in with Google or email to get the PDF instantly.
- 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.
Likes & comments
See what other teachers think and share a helpful note.
Create more worksheets in our Worksheet Studio
Generate fresh worksheets for any grade, topic, and language — free.
Open the Worksheet StudioRelated worksheets
Match word problems to addition and subtraction sentences - up to 20
Word problems involving addition and subtraction without comparisons - up to 20
Word problems with both addends unknown - up to 20
Word problems with change unknown - up to 20
Word problems with start unknown - up to 20
Word problems with sum or difference unknown - up to 20
Write number sentences for word problems - up to 20
For big organisations
For schools
For centers
For team leaders
For teachers
AI and resources
Printable worksheets
Interactive simulations
Teacher tools
AI studio
Ideas and research