Math Drill Pages

Expanded Form Worksheet

Twenty-four 3-digit place value problems for second graders. In Part A students write numbers like 527 in expanded form (500 + 20 + 7). In Part B they go the other way and write the number that an expanded form shows.

Grade
Grade 2
Problems
24
Time
About 15 minutes
Standard
2.NBT.A.3
Download PDF (US Letter) Download PDF (A4)

Two pages: the worksheet, then the answer key. No sign-up needed.

Worksheet preview

Part A: Write in expanded form Show the value of each digit.

  1. 613=600+10+3
  2. 449=400+40+9
  3. 471=400+70+1
  4. 136=100+30+6
  5. 617=600+10+7
  6. 721=700+20+1
  7. 339=300+30+9
  8. 159=100+50+9
  9. 148=100+40+8
  10. 117=100+10+7
  11. 775=700+70+5
  12. 332=300+30+2

Part B: Write the number Add the values to write the number.

  1. 200+80+9=289
  2. 700+20+8=728
  3. 100+30+4=134
  4. 400+80+5=485
  5. 500+20+5=525
  6. 700+30+2=732
  7. 600+40+9=649
  8. 900+10+8=918
  9. 300+40+2=342
  10. 500+80+5=585
  11. 300+20+9=329
  12. 100+20+5=125

Tips for teachers and parents

  • Have your student say each digit's value aloud: "the 5 is worth 500, the 2 is worth 20, the 7 is worth 7."
  • A place value chart with hundreds, tens and ones columns makes Part A easier for students who are still learning.
  • In Part B, students can line up the three numbers and add them, or simply read the hundreds, tens and ones digits.
  • Ask how many zeros go after each digit: none in the ones place, one in the tens place, two in the hundreds place.

Common mistakes

  • Writing the digits instead of their values, such as 5 + 2 + 7 for 527.
  • Adding too many zeros, for example writing 20 as 200. Checking that the parts add back to the number catches this.

What to practice next

Rounding to the nearest 10 and 100 builds on knowing what each digit is worth.

Frequently asked questions

What is expanded form?

Writing a number as the sum of its place values. 384 in expanded form is 300 + 80 + 4.

Do any numbers have a zero digit?

No. Every number on this sheet has three non-zero digits so that each part of the expanded form has a value to write.

Is there an answer key?

Yes, page 2 has all 24 answers.