🦕 DinosaursGrade 3Reading: grades 3-4RoundingWord problemsAdditionSubtractionDivision
The Case of the Missing Meteor Fragment
A giant meteor fragment, the pride of the Mesozoic Museum, has vanished overnight! Its special glow is gone. Lead detective Rex is on the case, but he needs your help to piece together the clues and find the dino-napper.
Suspects
Possible suspects
Cross off a row as each clue rules it out. On screen, tap a row.
21 of 21 still in play
| Name | Special Skill | Gadget | Quirk | Scale Color | Vulnerability |
|---|---|---|---|---|---|
| Chancellor Ceratosaurus | Can communicate with dinosaurs | Sonic whistle | Always faces east | Azure scales | Hates loud noises |
| Ambassador Archaeopteryx | Can dig super fast | Dino-scanner | Always faces west | Crimson scales | Hates loud noises |
| Sergeant Stegosaurus | Can control weather patterns | Sonic whistle | Always faces east | Azure scales | Can't swim |
| Duke Dilophosaurus | Can see in the dark | Sonic whistle | Always faces east | Azure scales | Loves loud noises |
| Lord Lystrosaurus | Can dig super fast | Sonic whistle | Always faces west | Azure scales | Can't swim |
| Jarl Jaggedrock | Can mimic any roar | Dino-scanner | Always faces east | Azure scales | Hates loud noises |
| Dr. Paleontologist | Can control weather patterns | Giant digging claw | Always faces east | Crimson scales | Hates loud noises |
| Knight Kentrosaurus | Can dig super fast | Dino-scanner | Always faces west | Azure scales | Can't swim |
| Captain Carcharodontosaurus | Can communicate with dinosaurs | Weather wand | Always faces east | Crimson scales | Loves loud noises |
| Admiral Allosaurus | Can mimic any roar | Weather wand | Always faces west | Azure scales | Hates loud noises |
| Professor Fossil | Can control weather patterns | Sonic whistle | Always faces west | Azure scales | Hates loud noises |
| Major Megalosaurus | Can mimic any roar | Weather wand | Always faces west | Golden scales | Hates loud noises |
| Mayor Maiasaura | Can see in the dark | Weather wand | Always faces west | Azure scales | Loves loud noises |
| Baron Von Bones | Can communicate with dinosaurs | Night-vision goggles | Always faces east | Azure scales | Hates loud noises |
| President Pachycephalosaurus | Can dig super fast | Night-vision goggles | Always faces east | Azure scales | Hates loud noises |
| Dame Agatha Ankylosaur | Can mimic any roar | Sonic whistle | Always faces west | Golden scales | Hates loud noises |
| Earl Edmontosaurus | Can dig super fast | Giant digging claw | Always faces west | Crimson scales | Can't swim |
| Viscount Velociraptor | Can dig super fast | Giant digging claw | Always faces west | Azure scales | Hates loud noises |
| Governor Giganotosaurus | Can mimic any roar | Giant digging claw | Always faces west | Azure scales | Hates loud noises |
| Marquis Muttaburrasaurus | Can see in the dark | Giant digging claw | Always faces west | Azure scales | Hates loud noises |
| Colonel Compsognathus | Can communicate with dinosaurs | Sonic whistle | Always faces east | Golden scales | Can't swim |
Clue 1
Rounding
The security guards found footprints and a single, muddy glove. They wondered how many steps it would take to leave the museum if each step was as long as the glove.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
T
50
400
5000
700
2000
80
900
80
300
7000
7000
5000
8000
800
5000
30
T
50
3000
5000
400
2000
80
700
300
90
800
300
40
600
300
8000
500
T
50
400
300
T
50
40
300
60
T
50
400
5000
60
2000
6000
5000
900
30
300
60
600
300
800
800
T
50
8000
2000
90
5000
8000
300
T
50
900
7000
60
400
900
8000
80
Round 47 to the nearest tenT
Round 6,652 to the nearest thousandP
Round 492 to the nearest hundredK
Round 5,047 to the nearest thousandE
Round 62 to the nearest tenS
Round 2,939 to the nearest thousandB
Round 399 to the nearest hundredH
Round 8,421 to the nearest thousandR
Round 917 to the nearest hundredO
Round 605 to the nearest hundredM
Round 835 to the nearest hundredL
Round 1,668 to the nearest thousandI
Round 720 to the nearest hundredD
Round 311 to the nearest hundredA
Round 5,869 to the nearest thousandZ
Round 78 to the nearest tenN
Round 30 to the nearest tenF
Round 87 to the nearest tenC
Round 39 to the nearest tenW
0/19 letters found
Clue 2
Word problems
The museum's radar tracked the meteor fragment's energy signature as it was moved. The readings were a bit fuzzy, so the guards had to round them to the nearest hundred.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Awitnesssawthevillainwas .
A
33
37
24
A
33
34
36
45
A
33
60
E
36
24
E
36
T
There were 44 dino teeth. 11 were used up. How many dino teeth are left?A
Dino detective found 46 amber chunks yesterday and 14 more today. How many amber chunks in all?C
Dino detective lined up 2 rows of 12 ancient ferns. How many ancient ferns in all?W
Dino detective found 18 petrified wood yesterday and 19 more today. How many petrified wood in all?L
Dino detective lined up 6 rows of 6 dino teeth. How many dino teeth in all?S
There were 41 fossilized eggs. 7 were used up. How many fossilized eggs are left?Y
Dino detective found 6 amber chunks yesterday and 39 more today. How many amber chunks in all?F
0/7 letters found
Clue 3
Addition
After the fragment was taken, the guards found several scattered pieces of equipment. They started a tally to see if they had enough spare parts to fix the display.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
T
509
477
987
250
304
955
972
955
551
636
636
987
757
529
972
T
509
677
972
551
264
987
250
T
509
757
725
304
955
529
T
509
972
987
677
638
551
636
987
551
638
757
972
677
677
T
509
477
987
818
972
551
T
509
232 + 277 =T
324 + 312 =P
266 + 372 =C
368 + 604 =O
474 + 203 =S
327 + 202 =G
140 + 124 =K
441 + 514 =N
307 + 244 =A
240 + 237 =H
249 + 508 =R
132 + 172 =I
387 + 338 =Y
525 + 462 =E
161 + 89 =D
524 + 294 =M
0/16 letters found
Clue 4
Subtraction
The dino-napper must have dropped something while making their getaway. The guards are trying to figure out how much valuable dino-dust was lost.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
A
218
281
788
872
251
317
123
A
218
662
567
754
123
281
837
A
218
317
123
468
A
218
281
761
198
567
872
369
281
374
567
837
293
374
198
374
193
123
509
A
218
837
293
369
198
198
754
587 - 369 =A
1191 - 354 =C
479 - 162 =L
666 - 4 =Z
200 - 77 =E
360 - 109 =G
1037 - 249 =I
857 - 96 =F
319 - 126 =H
624 - 343 =S
896 - 329 =U
1207 - 335 =N
891 - 382 =B
799 - 45 =R
739 - 370 =D
274 - 76 =O
451 - 77 =T
550 - 82 =W
482 - 189 =K
0/19 letters found
Clue 5
Division facts (1-12) — the last clue
The museum has a special scanner that can detect residual energy. It showed the fragment's energy was spread among several locations, and the guards need to know how much energy is at each spot.
First solve each problem. Then find each answer in the list below and cross that sentence out. One sentence will be left — that's exactly what the villain did!
Step 1 — solve these
77 ÷ 11 = ?
88 ÷ 8 = ?
80 ÷ 8 = ?
48 ÷ 6 = ?
12 ÷ 1 = ?
2 ÷ 2 = ?
21 ÷ 7 = ?
32 ÷ 8 = ?
25 ÷ 5 = ?
54 ÷ 9 = ?
81 ÷ 9 = ?
Step 2 — cross out the sentence with each answer
1.The villain borrowed, then scrambled away.
2.The villain borrowed, then vanished.
3.The villain tricked, then disappeared.
4.The villain sneaked, then fled.
5.The villain borrowed, then disappeared.
6.The villain sneaked, then disappeared.
7.The villain sneaked, then vanished.
8.The villain stole, then vanished.
9.The villain borrowed, then sprinted off.
10.The villain sneaked, then sprinted off.
11.The villain tricked, then vanished.
12.The villain robbed, then scrambled away.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Case of the Missing Meteor Fragment
Culprit: Marquis Muttaburrasaurus (Can see in the dark · Giant digging claw · Always faces west · Azure scales · Hates loud noises)
- Clue 1 (Rounding): "THE DINO NAPPER LEFT BEHIND A CLAW MARK THAT WAS THE SIZE OF A SMALL TRICERATOPS HORN"Round 47 to the nearest ten = 50 (T) · Round 6,652 to the nearest thousand = 7000 (P) · Round 492 to the nearest hundred = 500 (K) · Round 5,047 to the nearest thousand = 5000 (E) · Round 62 to the nearest ten = 60 (S) · Round 2,939 to the nearest thousand = 3000 (B) · Round 399 to the nearest hundred = 400 (H) · Round 8,421 to the nearest thousand = 8000 (R) · Round 917 to the nearest hundred = 900 (O) · Round 605 to the nearest hundred = 600 (M) · Round 835 to the nearest hundred = 800 (L) · Round 1,668 to the nearest thousand = 2000 (I) · Round 720 to the nearest hundred = 700 (D) · Round 311 to the nearest hundred = 300 (A) · Round 5,869 to the nearest thousand = 6000 (Z) · Round 78 to the nearest ten = 80 (N) · Round 30 to the nearest ten = 30 (F) · Round 87 to the nearest ten = 90 (C) · Round 39 to the nearest ten = 40 (W)
- Clue 2 (Word problems): "ALWAYS FACES WEST"There were 44 dino teeth. 11 were used up. How many dino teeth are left? = 33 (A) · Dino detective found 46 amber chunks yesterday and 14 more today. How many amber chunks in all? = 60 (C) · Dino detective lined up 2 rows of 12 ancient ferns. How many ancient ferns in all? = 24 (W) · Dino detective found 18 petrified wood yesterday and 19 more today. How many petrified wood in all? = 37 (L) · Dino detective lined up 6 rows of 6 dino teeth. How many dino teeth in all? = 36 (S) · There were 41 fossilized eggs. 7 were used up. How many fossilized eggs are left? = 34 (Y) · Dino detective found 6 amber chunks yesterday and 39 more today. How many amber chunks in all? = 45 (F)
- Clue 3 (Addition): "THE DINO NAPPER GOT SOAKED TRYING TO ESCAPE ACROSS THE MOAT"232 + 277 = 509 (T) · 324 + 312 = 636 (P) · 266 + 372 = 638 (C) · 368 + 604 = 972 (O) · 474 + 203 = 677 (S) · 327 + 202 = 529 (G) · 140 + 124 = 264 (K) · 441 + 514 = 955 (N) · 307 + 244 = 551 (A) · 240 + 237 = 477 (H) · 249 + 508 = 757 (R) · 132 + 172 = 304 (I) · 387 + 338 = 725 (Y) · 525 + 462 = 987 (E) · 161 + 89 = 250 (D) · 524 + 294 = 818 (M)
- Clue 4 (Subtraction): "A SINGLE AZURE SCALE WAS FOUND STUCK TO THE BACK DOOR"587 - 369 = 218 (A) · 1191 - 354 = 837 (C) · 479 - 162 = 317 (L) · 666 - 4 = 662 (Z) · 200 - 77 = 123 (E) · 360 - 109 = 251 (G) · 1037 - 249 = 788 (I) · 857 - 96 = 761 (F) · 319 - 126 = 193 (H) · 624 - 343 = 281 (S) · 896 - 329 = 567 (U) · 1207 - 335 = 872 (N) · 891 - 382 = 509 (B) · 799 - 45 = 754 (R) · 739 - 370 = 369 (D) · 274 - 76 = 198 (O) · 451 - 77 = 374 (T) · 550 - 82 = 468 (W) · 482 - 189 = 293 (K)
- Clue 5 (Division facts (1-12)): surviving statement (box 2) → Marquis Muttaburrasaurus77 ÷ 11 = 7 · 88 ÷ 8 = 11 · 80 ÷ 8 = 10 · 48 ÷ 6 = 8 · 12 ÷ 1 = 12 · 2 ÷ 2 = 1 · 21 ÷ 7 = 3 · 32 ÷ 8 = 4 · 25 ÷ 5 = 5 · 54 ÷ 9 = 6 · 81 ÷ 9 = 9
About this mystery
- Grade level
- Grade 3 math
- Math topics
- Rounding, Word problems, Addition, Subtraction, Division
- Reading level
- grades 3-4
- Theme
- The Case of the Missing Meteor Fragment — set in The Mesozoic Museum of Mystery
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects