Adding Two-Digit Numbers Worksheet
Grade 1 Math · printable worksheet (PDF) with answer key · 14 problems · CCSS 1.NBT.C.4
A printable grade 1 adding two-digit numbers practice worksheet with 14 problems and a complete, step-by-step answer key — formatted to print cleanly on standard paper. Included in the one-time $20 unlock for the full NudgeLearn library.
Sample problems
Add the ones first, then the tens. When you add a ten, only the tens digit changes.
- 1. What is ?
- 2. What is ?
- 3. What is ?
- 4. What is ?
Plus 10 more problems and a full answer key in the PDF.
Get it with all of Grade 1 Math for a one-time $8, or unlock the entire library (over 400 worksheets + 55 final tests, every grade) for $20. Yours forever.
Photograph the finished stack and NudgeLearn's grader marks every answer and explains each mistake on the page. For writing, it scores essays against 86 state and AP rubrics including STAAR, NJSLA and Florida BEST. Free for 20 graded items a month.