About this worksheet
Ten three-digit numbers down the left, with a column for adding 10 and a column for adding 100. A worked example at the top (325 + 10 = 335 and 325 + 100 = 425) shows the pattern before the first row.
The point is to notice that adding 10 changes only the tens digit and adding 100 changes only the hundreds. 699 is the row to watch, because adding 10 rolls the tens over and the answer is 709.
What students will practice
- Mentally add 10 to a three-digit number
- Mentally add 100 to a three-digit number
- See which digit changes and why
Details
- Grade level
- Grade 2
- Subject
- Math · Addition
- Standard
- CCSS 2.NBT.B.8
- Pages
- 1
- Format
- PDF · US Letter and A4 included
- License
- Free for classroom use · Attribution appreciated
- Last updated
- October 13, 2026
