Underline the digit in the hundred thousands place.
Standard Form & Underline
2,783,405
4
Directions: Use your advanced detective analytics to solve these comparisons. Determine how many times greater a digit's value is when it shifts position.
D1. SHIFT COMPARISON
Compare the value of the digit 6 in 650,420 to the digit 6 in 6,500,000.
The 6 in 6,500,000 is 10 times the value of the 6 in 650,420.
D2. SCALE INVESTIGATION
Compare the underlined digit in 3,240,195 with the underlined digit in 1,824,900.
The underlined 2 in 3,240,195 is 10 times the 2 in 1,824,900.
D3. DOUBLE AGENT REPORT
An agent claims that in the number 4,451,000, the underlined 4 on the left is exactly 10 times the value of the 4 next to it. Is the agent correct? Explain your analytical proof below.
Yes, the agent is correct. The left underlined 4 is in the Millions place (4,000,000) and the right underlined 4 is in the Hundred Thousands place (400,000). Since 4,000,000 is 10 times 400,000, the left 4 is indeed 10x larger.
Official proof-checked key for fourth-grade mathematical diagnostics.
HEAD GRADER VERIFIED BY
08/17/2026 DATE SIGNED
OFFICIAL ANSWER KEY • GRADER PREPARED
PAGE 2 OF 2
4,029,581
What is the exact numerical value of the underlined digit?
Record on Log #10
CARD 11
Value Identification
Analyze the clue number below:
3,490,612
What is the exact numerical value of the underlined digit?
Record on Log #11
CARD 12
Value Identification
Analyze the clue number below:
9,152,704
What is the exact numerical value of the underlined digit?
Record on Log #12
DIGIT DETECTIVE STATION SET • TO BE CUT AND LAMINATED PAGE 2 OF 6
CASE STATIONS • SET 3
Instructions: Solve each card and record your discoveries on your Agent Case Log sheet.
CARD 13
Word Form Decoding
Decode the verbal message:
"Six million, two hundred thousand, forty-five."
In this number, what digit sits in the hundred thousands place?
Record on Log #13
CARD 14
Word Form Decoding
Decode the verbal message:
"Nine million, fifty-four thousand, eight hundred one."
What is the numerical value of the digit in the ten thousands place?
Record on Log #14
CARD 15
Word Form Decoding
Decode the verbal message:
"Three million, seven hundred twelve thousand, nine hundred sixty."
What is the exact place value name of the digit 7 in this number?
Record on Log #15
CARD 16
Word Form Decoding
Decode the verbal message:
"One million, eight hundred five thousand, three hundred."
What is the numerical value of the digit in the millions place?
Record on Log #16
CARD 17
Word Form Decoding
Decode the verbal message:
"Five million, ninety-two thousand, four hundred eleven."
Which single digit is located in the thousands place?
Record on Log #17
CARD 18
Word Form Decoding
Decode the verbal message:
"Seven million, four hundred three thousand, fifty-six."
What is the numerical value of the digit in the hundreds place?
Record on Log #18
DIGIT DETECTIVE STATION SET • TO BE CUT AND LAMINATED PAGE 3 OF 6
CASE STATIONS • SET 4
Instructions: Solve each card and record your discoveries on your Agent Case Log sheet.
CARD 19
Place Comparison
Investigate the shift below:
4,450,000
How many times greater is the value of the 4 in the millions place than the 4 next to it in the hundred thousands place?
Record on Log #19
CARD 20
Place Comparison
Investigate the shift below:
723,200
How many times greater is the 2 in the ten thousands place than the 2 in the hundreds place?
Record on Log #20
CARD 21
Place Comparison
Which number has a 5 that is exactly 10 times the value of the 5 in 150,000?
A) 1,500,000
B) 52,000
C) 5,100,000
Record on Log #21
CARD 22
Place Comparison
Evaluate the claim:
"The 8 in 8,204,500 is exactly 10 times the value of the 8 in 85,300."
Is this claim True or False?
Record on Log #22
CARD 23
Place Comparison
Fill in the blank:
The 9 in 9,104,000 is _______ times the value of the 9 in 4,912,000.
Record on Log #23
CARD 24
Place Comparison
Analyze the pattern:
In the number 3,333,333, how does the value of any digit change as it shifts exactly one place to the left?
Record on Log #24
DIGIT DETECTIVE STATION SET • TO BE CUT AND LAMINATED PAGE 4 OF 6
Active Field Log
STATION RECORD: #PV-24
Agent Name: _________________
Date: _______________
Agent Badge: _________
CARD 01
CARD 02
CARD 03
CARD 04
CARD 05
CARD 06
CARD 07
CARD 08
CARD 09
CARD 10
CARD 11
CARD 12
CARD 13
CARD 14
CARD 15
CARD 16
CARD 17
CARD 18
CARD 19
CARD 20
CARD 21
CARD 22
CARD 23
CARD 24
I certify that all 24 security cards have been scanned, verified, and resolved.
Agent Signature Score / 24
STUDENT CASE RECORD • PLACE VALUE DIAGNOSTICS PAGE 5 OF 6
Teacher grading guide
MASTER KEY
CARD 01 (Identify Place) Ten Thousands
CARD 02 (Identify Place) Hundred Thousands
CARD 03 (Identify Place) Millions
CARD 04 (Identify Place) Hundreds
CARD 05 (Identify Place) Tens
CARD 06 (Identify Place) Ones
CARD 07 (Digit Value) 300,000
CARD 08 (Digit Value) 1,000
CARD 09 (Digit Value) 5,000,000
CARD 10 (Digit Value) 80
CARD 11 (Digit Value) 90,000
CARD 12 (Digit Value) 700
CARD 13 (Word Form) 2
CARD 14 (Word Form) 50,000
CARD 15 (Word Form) Hund. Thousands
CARD 16 (Word Form) 1,000,000
CARD 17 (Word Form) 2
CARD 18 (Word Form) 0
CARD 19 (Comparing) 10 times
CARD 20 (Comparing) 100 times
CARD 21 (Comparing) A (1,500,000)
CARD 22 (Comparing) False (100 times)
CARD 23 (Comparing) 10
CARD 24 (Comparing) 10 times larger
Verification Complete • Answer sheet matches Station set perfectly
GRADER ID: #PV-24KEY VERSION: 4.1
OFFICIAL ANSWER LOG • TEACHER GRADING KEY PAGE 6 OF 6
How do we write:
"Eight million, five hundred six"?
✗ Wrong Way: 8,506 (That is eight thousand!)
✓ Correct: 8,000,506 (Perfect 7-digit millions layout!)
Notice that the Thousands Period is not mentioned at all!
To hold the millions place in position, we must load the thousands period with three zero guards: 000.
Also, "five hundred six" has no tens value, written as 506!
EVERY COMMA DEMANDS A COMPLETE THREE-DIGIT SET BEHIND IT! SLIDE 5 OF 6
LIVE FIELD TEST
TEAM MISSION
Work as an active squad to convert these written clues into standard codes:
CODE ALPHA: "Two million, three hundred forty thousand, ten."
_ , _ _ _ , _ _ _
CODE BETA: "Nine million, four thousand, six hundred fifty."
_ , _ _ _ , _ _ _
CODE GAMMA: "Five million, eight hundred thousand, twelve."
_ , _ _ _ , _ _ _
SHARE SOLUTIONS WITH YOUR PARTNER AGENTS • CRACK THE CODE! SLIDE 6 OF 6
Official proof-checked key for fourth-grade mathematical diagnostics.
HEAD GRADER VERIFIED BY
08/17/2026 DATE SIGNED
OFFICIAL ANSWER KEY • GRADER PREPARED
PAGE 2 OF 2
RESTRICTED CODES • GRAMMAR DEFENSE UNIT
PAGE 2 OF 2
Corrected Solution:
Last Tuesday, Dr. Jones asked, "Did you see the green alien in Roswell, New Mexico?"
Proof Details: Cap "Last", "Tuesday", "Dr.", "Jones", "Did", "Roswell", "New", "Mexico". Commas after "Tuesday", "asked", and "Roswell". Question mark inside quote.
Acceptable answer details: Students should identify a specific rule (like the city/state comma or quote placement) and write a proper explanatory sentence about it.
Official proof-checked key for fourth-grade daily grammar warm-ups.
HEAD INSTRUCTOR VERIFIED BY
08/17/2026 DATE SIGNED
OFFICIAL ANSWER KEY • GRADER PREPARED
PAGE 2 OF 2
The careful officer silently checked the back door.
How many adverbs? ______
5. PLURAL PATROL
Write the plural form of the singular noun:
tooth → ________
hero → ________
6. WORD DETECTIVE
Choose the SYNONYM of the underlined word:
The clues were very obvious to the team.
hidden
clear
confusing
7. ABC DISPATCH
Write the words in alphabetical order:
badge, buster, brief, backyard
8. HOMOPHONE TARGET
Circle the correct homophone word:
I (know / no) that we can crack this secret code.
9. SUBJECT-VERB AGREEMENT
Circle the verb that fits perfectly:
Neither of the suspects (claims / claim) the briefcase.
10. SENTENCE REPAIR
Rewrite to fix the double negative:
The guard didn't see nobody in the vault.
DAILY REVIEW SYSTEM • SKILLS SECURED DAY-BY-DAY PAGE 2 OF 5
Daily Language Review • Day-by-Day Grid System
MISSION: DAY 3
SCORE: _____ / 10
Officer: _________________
Badge No: _________
Date: _______________
1. CAPITALIZATION
Use ≡ for capitals:
the monument stands in washington, d.c., near the potomac river.
2. PUNCTUATION
Insert commas and quotes with ^
Please listen carefully said the librarian.
3. SPELLING CRIMINALS
Find and correct the misspelled word:
There were too many clues to analyze in one hourr.
4. PARTS OF SPEECH
Circle the PRONOUNS in the sentence:
She told us that they solved the case yesterday.
How many pronouns? ______
5. PLURAL PATROL
Write the plural form of the singular noun:
ox → ________
goose → ________
6. WORD DETECTIVE
Choose the SYNONYM of the underlined word:
The agent's energy was completely depleted.
empty
full
strong
7. ABC DISPATCH
Write the words in alphabetical order:
sheriff, siren, sketch, suspect
8. HOMOPHONE TARGET
Circle the correct homophone word:
Please (right / write) your name on the docket line.
9. SUBJECT-VERB AGREEMENT
Circle the verb that fits perfectly:
The family of officers (attend / attends) the ceremony.
10. SENTENCE REPAIR
Rewrite to fix the fragment sentence:
Running through the dark alley in a hurry.
DAILY REVIEW SYSTEM • SKILLS SECURED DAY-BY-DAY PAGE 3 OF 5
Daily Language Review • Day-by-Day Grid System
MISSION: DAY 4
SCORE: _____ / 10
Officer: _________________
Badge No: _________
Date: _______________
1. CAPITALIZATION
Use ≡ for capitals:
on national holidays, the smith family flies across the atlantic ocean.
2. PUNCTUATION
Insert commas and quotes with ^
Is this the file you wanted? asked Detective Smith.
3. SPELLING CRIMINALS
Find and correct the misspelled word:
I am shure we will arrive early for shift.
4. PARTS OF SPEECH
Circle the CONJUNCTIONS in the sentence:
He searched the lab, but he did not find any prints or clues.
How many conjunctions? ______
5. PLURAL PATROL
Write the plural form of the singular noun:
wolf → ________
cactus → ________
6. WORD DETECTIVE
Choose the ANTONYM of the underlined word:
The evidence was incredibly scarce.
rare
plentiful
hidden
7. ABC DISPATCH
Write the words in alphabetical order:
print, patrol, padlock, pocket
8. HOMOPHONE TARGET
Circle the correct homophone word:
We will cross the (road / rode) to secure the perimeter.
9. SUBJECT-VERB AGREEMENT
Circle the verb that fits perfectly:
A box of secret tools (was / were) left on the table.
10. SENTENCE REPAIR
Rewrite to fix the run-on sentence:
The lock broke the door swung open everyone gasped.
DAILY REVIEW SYSTEM • SKILLS SECURED DAY-BY-DAY PAGE 4 OF 5
Daily Language Review • Day-by-Day Grid System
MISSION: DAY 5
SCORE: _____ / 10
Officer: _________________
Badge No: _________
Date: _______________
1. CAPITALIZATION
Use ≡ for capitals:
on a trip to yellowstone national park, we met dr. jackson.
2. PUNCTUATION
Insert commas and quotes with ^
Wow that was close! whispered Officer Adams.
3. SPELLING CRIMINALS
Find and correct the misspelled word:
I wrote a letter to the principal of my school yesteday.
4. PARTS OF SPEECH
Circle the NOUNS in the sentence:
The bold dog barked at the sneaky robber.
How many nouns? ______
5. PLURAL PATROL
Write the plural form of the singular noun:
person → ________
deer → ________
6. WORD DETECTIVE
Choose the SYNONYM of the underlined word:
The patrol car had a very robust engine.
weak
strong
slow
7. ABC DISPATCH
Write the words in alphabetical order:
agent, active, asset, arrest
8. HOMOPHONE TARGET
Circle the correct homophone word:
Do not lose (its / it's) small gold tracking key.
9. SUBJECT-VERB AGREEMENT
Circle the verb that fits perfectly:
Neither the sergeant nor his deputies (know / knows) the code.
10. SENTENCE REPAIR
Rewrite to fix the run-on sentence:
The thief ran fast he escaped down the alley.
DAILY REVIEW SYSTEM • SKILLS SECURED DAY-BY-DAY PAGE 5 OF 5
Synonym of obvious:
clear
7. ABC DISPATCH
Alphabetical order:
backyard, badge, brief, buster
8. HOMOPHONE TARGET
Homophone:
know
9. SUBJECT-VERB AGREEMENT
Verb selection:
claims (Neither... claims)
10. SENTENCE REPAIR
Fix double negative:
The guard didn't see anyone (or: saw nobody) in the vault.
OFFICIAL MASTER GRADER LOG PAGE 2 OF 5
ANSWER KEY
Official Master Teacher Answer Key • Day-by-Day Solutions
MISSION: DAY 3
SOLVED LOG
Officer: MASTER KEY
Badge No: #GR-KEY
Date: 08/17/2026
1. CAPITALIZATION
the monument stands in washington, d.c., near the potomac river.
The monument stands in Washington, D.C., near the Potomac River.
2. PUNCTUATION
Please listen carefully said the librarian.
"Please listen carefully," said the librarian.
3. SPELLING CRIMINALS
"hourr" →
hour
4. PARTS OF SPEECH
Circle Pronouns:
She told us that they solved the case.
Total: 3 pronouns
5. PLURAL PATROL
Plural solutions:
ox → oxen
goose → geese
6. WORD DETECTIVE
Synonym of depleted:
empty
7. ABC DISPATCH
Alphabetical order:
sheriff, siren, sketch, suspect
8. HOMOPHONE TARGET
Homophone:
write
9. SUBJECT-VERB AGREEMENT
Verb selection:
attends (family... attends)
10. SENTENCE REPAIR
Fix fragment:
He was running through the dark alley in a hurry. (or similar subject+verb addition)
OFFICIAL MASTER GRADER LOG PAGE 3 OF 5
ANSWER KEY
Official Master Teacher Answer Key • Day-by-Day Solutions
MISSION: DAY 4
SOLVED LOG
Officer: MASTER KEY
Badge No: #GR-KEY
Date: 08/17/2026
1. CAPITALIZATION
on national holidays, the smith family flies across the atlantic ocean.
On national holidays, the Smith family flies across the Atlantic Ocean.
2. PUNCTUATION
Is this the file you wanted? asked Detective Smith.
"Is this the file you wanted?" asked Detective Smith.
3. SPELLING CRIMINALS
"shure" →
sure
4. PARTS OF SPEECH
Circle Conjunctions:
He searched the lab, but he did not find any prints or clues.
Total: 2 conjunctions
5. PLURAL PATROL
Plural solutions:
wolf → wolves
cactus → cacti
6. WORD DETECTIVE
Antonym of scarce:
plentiful
7. ABC DISPATCH
Alphabetical order:
padlock, patrol, pocket, print
8. HOMOPHONE TARGET
Homophone:
road
9. SUBJECT-VERB AGREEMENT
Verb selection:
was (box... was)
10. SENTENCE REPAIR
Run-on fix:
The lock broke, the door swung open, and everyone gasped. (or similar correct split)
OFFICIAL MASTER GRADER LOG PAGE 4 OF 5
ANSWER KEY
Official Master Teacher Answer Key • Day-by-Day Solutions
MISSION: DAY 5
SOLVED LOG
Officer: MASTER KEY
Badge No: #GR-KEY
Date: 08/17/2026
1. CAPITALIZATION
on a trip to yellowstone national park, we met dr. jackson.
On a trip to Yellowstone National Park, we met Dr. Jackson.
2. PUNCTUATION
Wow that was close! whispered Officer Adams.
"Wow! That was close!" whispered Officer Adams.
3. SPELLING CRIMINALS
"yesteday" →
yesterday
4. PARTS OF SPEECH
Circle Nouns:
The bold dog barked at the sneaky robber.
Total: 2 nouns
5. PLURAL PATROL
Plural solutions:
person → people
deer → deer
6. WORD DETECTIVE
Synonym of robust:
strong
7. ABC DISPATCH
Alphabetical order:
active, agent, arrest, asset
8. HOMOPHONE TARGET
Homophone:
its (tracking key)
9. SUBJECT-VERB AGREEMENT
Verb selection:
know (plural deputies)
10. SENTENCE REPAIR
Run-on fix:
The thief ran fast, and he escaped down the alley. (or split with period)
OFFICIAL MASTER GRADER LOG PAGE 5 OF 5
HEAD GRADER VERIFIED BY
08/17/2026 DATE SIGNED
OFFICIAL ANSWER KEY • GRADER PREPARED
PAGE 2 OF 2
Official proof-checked key for fourth-grade daily mathematical diagnostics.
HEAD GRADER VERIFIED BY
08/17/2026 DATE SIGNED
OFFICIAL ANSWER KEY • GRADER PREPARED
PAGE 2 OF 2
