Add within 20 using a number line
Grade 1 math worksheet — 12 problems. Answer key included. First graders add within 20 by hopping forward on a number line, starting at the first addend and counting on. Counting cubes and counters appear in the models so each hop connects to something children can touch. The set closes with two number lines to judge - children pick the correct model and explain why.
12 problems
One-time purchase · yours to keep · answer key included
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✅ Answer key included
Preview
Preview shows a portion of the worksheet. The full PDF includes every problem plus the answer key.
Highlights
- Grade
- Grade 1
- Subject
- Math
- Pages
- 2 · worksheet + answer key
- Answer key
- ✅ Included
- Quality
- ✓ Verified
- Class time
- about 15 min
What's inside
Grade 1 math worksheet. 2 pages, 12 problems. Answer key included. Printable PDF, print-and-go.
What’s included
- 12 problems across 2 pages
- Suggested use: morning work, classwork, homework, math centers, or sub plans
Answer keys
Answer key included.
Format
PDF, print-and-go.
Classroom use
One license per teacher: print as many copies as you need for your own students and share through your class platform. Please don’t post the files publicly. License details.
Quick answers
What does this worksheet cover?
Grade 1 Math.
How many problems are included?
12 problems.
Does it include an answer key?
Yes — an answer key is included.
How much does it cost?
$0.99 — a one-time purchase, yours to keep. No subscription.
What format is the worksheet?
A printable PDF, 2 pages.
More grade 1 math worksheets
Addition Within 20
Comparing Two-Digit Numbers
Counting and Writing Numbers to 120
