Digit Detectives Worksheet
Detective Academy • Math Unit 1
Digit Detectives Worksheet
Grade 3 Place Value
Detective Name:
Date:
Score: _____ / 25
1
Mission 1: Uncover the Digit Values
8 Points
Examine the underlined digit in each suspect number. Write its Place Value (Hundreds, Tens, or Ones) and its Total Value.
A. 472
Place:
Value:
B. 819
Place:
Value:
C. 305
Place:
Value:
D. 1,640
Place:
Value:
Base-Ten Evidence Clue:
3 hundreds flats, 5 tens rods, and 8 ones units are found at the scene.
Standard Number:
2
Mission 2: The Number Forms Vault
8 Points
Fill in the missing standard, expanded, or word forms to unlock each security vault.
Standard Form 563
Expanded Form
Word Form five hundred sixty-three
Standard Form
Expanded Form 700 + 40 + 8
Word Form
Standard Form 904
Expanded Form
Word Form
Standard Form 1,250
Expanded Form 1,000 + 200 + 50
Word Form
Which represents "eight hundred twenty"?
802 820 82 8,020
Continue to Page 2 for Missions 3, 4, and 5 Page 1 of 2
Digit Detectives: Field Report
Detective:
Page 2 of 2
3
Mission 3: The Symbol Showdown
6 Points
Compare each pair using > (greater than), < (less than), or = (equal to). Write the symbol in the circle.
542
524
780
708
300 + 60 + 9
369
815
851
1,040
1,400
6 hundreds + 4 ones
640
4
Mission 4: Place Value Lineup
4 Points
Put each group of suspect numbers in order. Pay close attention to the order direction!
A. Order from LEAST to GREATEST:
428 • 482 • 284 • 842
<
<
<
B. Order from GREATEST to LEAST:
619 • 916 • 691 • 196
>
>
>
★
Mission 5: Case of the Secret Safe Code
3 Points Bonus
Detective Clues:
• I am a 3-digit number.
• My hundreds digit is an even number greater than 6.
• My tens digit has a value of 40.
• The sum of all three of my digits is 13.
Detective Scratchpad
H
T
O
Safe Code:
Well done, Detective! Hand in your case report for review. Case Solved
