Adding 10 and 100 Worksheet (Mental Math)
Free grade 2 mental math worksheet: add 10 or 100 to three-digit numbers in your head. 20 problems, printable PDF with answer key.
Download the free PDF
Page 2 of the PDF is the answer key. Every download has new numbers.
How to help your child
- Adding 10 changes only the tens digit. Adding 100 changes only the hundreds digit.
- Say the number out loud, then the new one.
- The answer key is on page 2 of the PDF.
