🦕 DinosaursGrade 4Reading: grades 3-4AdditionRoundingSubtractionMultiplicationDivision

The Great Dino-Valley Caper

Oh no! Someone took the Golden Fossil from the Dino-Valley Rescue Center! Chief Ranger Pete needs your help to track down the sneaky dinosaur who took it.

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	Dino Skill	Special Feature	Footprint Type	Feathers or Crest	Dino Distraction
Titus	tree climb	glowing tail	left-clawed footprint	blue feathers	shiny mirrors
Toby	super speed	night vision	right-clawed footprint	blue feathers	squeaky toys
Rocky	loud stomp	night vision	left-clawed footprint	green crest	squeaky toys
Penny	tail swipe	armor plates	left-clawed footprint	red spikes	shiny mirrors
Sally	loud stomp	crest horn	left-clawed footprint	blue feathers	shiny mirrors
Bronto	tree climb	sharp claws	left-clawed footprint	red spikes	shiny mirrors
Spike	super speed	crest horn	left-clawed footprint	red spikes	squeaky toys
Rex	tree climb	armor plates	left-clawed footprint	red spikes	shiny mirrors
Zoey	high jump	armor plates	left-clawed footprint	blue feathers	shiny mirrors
Becky	loud stomp	night vision	right-clawed footprint	red spikes	shiny mirrors
Trixie	loud stomp	glowing tail	left-clawed footprint	blue feathers	shiny mirrors
Ziggy	loud stomp	night vision	right-clawed footprint	green crest	squeaky toys
Cooper	high jump	sharp claws	right-clawed footprint	blue feathers	shiny mirrors
Bella	tree climb	night vision	left-clawed footprint	blue feathers	shiny mirrors
Dash	high jump	armor plates	left-clawed footprint	red spikes	shiny mirrors
Otis	super speed	sharp claws	left-clawed footprint	green crest	shiny mirrors
Wally	loud stomp	night vision	left-clawed footprint	red spikes	sweet apples
Daisy	tail swipe	sharp claws	left-clawed footprint	blue feathers	squeaky toys
Steggy	tail swipe	crest horn	left-clawed footprint	red spikes	squeaky toys
Raptor	super speed	glowing tail	left-clawed footprint	blue feathers	sweet apples
Gemma	tail swipe	armor plates	left-clawed footprint	blue feathers	squeaky toys

Clue 1

Addition

Ranger Pete is counting the footprints left in the mud. Let us add up all the prints to find our first clue.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

4311

5050

5427

8068

9485

5427

6421

3890

6552

6709

7628

9485

2916

5050

6421

8068

9485

2916

6529

4791

5427

8068

4311

5050

2916

4791

9485

2926 + 1385 =T

3314 + 1736 =H

3393 + 2034 =E

2441 + 1449 =K

4307 + 3321 =I

5945 + 3540 =N

4349 + 2180 =C

2858 + 3851 =D

2443 + 5625 =S

2386 + 2405 =R

1412 + 1504 =O

3969 + 2583 =Y

3202 + 3219 =A

0/13 letters found

Clue 2

Rounding

The computer scanner tracks the dino's speed. It only shows numbers rounded to the nearest ten.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

170

1100

1700

130

900

3000

200

1100

2000

170

2900

1700

2000

1100

200

170

110

2900

3000

2300

4300

9000

Round 23 to the nearest tenT

Round 113 to the nearest tenD

Round 51 to the nearest tenR

Round 2,909 to the nearest hundredF

Round 133 to the nearest tenK

Round 4,290 to the nearest hundredI

Round 29 to the nearest tenH

Round 940 to the nearest hundredS

Round 243 to the nearest hundredW

Round 9,335 to the nearest thousandN

Round 2,876 to the nearest thousandO

Round 2,300 to the nearest hundredP

Round 1,653 to the nearest hundredC

Round 2,101 to the nearest thousandL

Round 170 to the nearest tenE

Round 1,136 to the nearest hundredA

0/16 letters found

Clue 3

Subtraction

Some sweet leaves are missing from the dino food bin. Let us subtract what is left to see how many were taken.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

8691

4662

3385

1497

4818

3385

4717

4256

4531

6871

4035

4818

3255

1116

4717

4818

4717

8942

4717

4531

1219

1116

3255

4214

1497

4662

4035

4818

4531

4214

4035

1116

3255

1116

1497

11184 - 2493 =T

4888 - 632 =K

6564 - 1847 =A

4555 - 1170 =E

9297 - 4766 =Y

9153 - 4491 =H

11226 - 4355 =D

5202 - 3983 =F

8781 - 4746 =I

12482 - 3540 =W

4012 - 2896 =R

6375 - 1557 =N

1739 - 242 =S

7041 - 2827 =M

7402 - 4147 =O

0/15 letters found

Clue 4

Multiplication facts (1-12)

We found rows of egg nests near the river. Let us multiply the rows to see how many nests there are.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

108

9 × 2 =T

8 × 11 =B

11 × 7 =D

9 × 12 =R

2 × 2 =S

5 × 11 =C

11 × 4 =L

4 × 12 =I

2 × 1 =F

9 × 6 =A

9 × 7 =N

3 × 11 =O

9 × 8 =V

4 × 9 =E

6 × 7 =H

3 × 9 =U

0/16 letters found

Clue 5

Division facts (1-12) — the last clue

Let us share these treats equally among the baby raptors. Division will help us find the final clue!

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

8 ÷ 4 = ?

55 ÷ 11 = ?

72 ÷ 6 = ?

88 ÷ 8 = ?

99 ÷ 11 = ?

64 ÷ 8 = ?

6 ÷ 6 = ?

36 ÷ 9 = ?

120 ÷ 12 = ?

3 ÷ 1 = ?

28 ÷ 4 = ?

Step 2 — cross out the sentence with each answer

1.The villain dashed past the cameras, then cut the ropes with sharp claws.

2.The villain jumped over the tall gate, then blocked the lasers with armor plates.

3.The villain swiped the lock with its tail, then blocked the lasers with armor plates.

4.The villain stomped through the mud, then snuck through the dark with night vision.

5.The villain climbed the high leafy tree, then snuck through the dark with night vision.

6.The villain climbed the high leafy tree, then lit up the tunnel with its glowing tail.

7.The villain climbed the high leafy tree, then cut the ropes with sharp claws.

8.The villain stomped through the mud, then blocked the lasers with armor plates.

9.The villain dashed past the cameras, then lit up the tunnel with its glowing tail.

10.The villain swiped the lock with its tail, then slipped past the branch with its crest horn.

11.The villain dashed past the cameras, then blocked the lasers with armor plates.

12.The villain stomped through the mud, then lit up the tunnel with its glowing tail.

Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — The Great Dino-Valley Caper

Culprit: Titus (tree climb · glowing tail · left-clawed footprint · blue feathers · shiny mirrors)

Clue 1 (Addition): "THE SNEAKY DINO HAS NO CREST HORN"
2926 + 1385 = 4311 (T) · 3314 + 1736 = 5050 (H) · 3393 + 2034 = 5427 (E) · 2441 + 1449 = 3890 (K) · 4307 + 3321 = 7628 (I) · 5945 + 3540 = 9485 (N) · 4349 + 2180 = 6529 (C) · 2858 + 3851 = 6709 (D) · 2443 + 5625 = 8068 (S) · 2386 + 2405 = 4791 (R) · 1412 + 1504 = 2916 (O) · 3969 + 2583 = 6552 (Y) · 3202 + 3219 = 6421 (A)
Clue 2 (Rounding): "THE TRACKS SHOW A LEFT CLAWED FOOTPRINT"
Round 23 to the nearest ten = 20 (T) · Round 113 to the nearest ten = 110 (D) · Round 51 to the nearest ten = 50 (R) · Round 2,909 to the nearest hundred = 2900 (F) · Round 133 to the nearest ten = 130 (K) · Round 4,290 to the nearest hundred = 4300 (I) · Round 29 to the nearest ten = 30 (H) · Round 940 to the nearest hundred = 900 (S) · Round 243 to the nearest hundred = 200 (W) · Round 9,335 to the nearest thousand = 9000 (N) · Round 2,876 to the nearest thousand = 3000 (O) · Round 2,300 to the nearest hundred = 2300 (P) · Round 1,653 to the nearest hundred = 1700 (C) · Round 2,101 to the nearest thousand = 2000 (L) · Round 170 to the nearest ten = 170 (E) · Round 1,136 to the nearest hundred = 1100 (A)
Clue 3 (Subtraction): "THE SNEAKY DINO RAN AWAY FROM SHINY MIRRORS"
11184 - 2493 = 8691 (T) · 4888 - 632 = 4256 (K) · 6564 - 1847 = 4717 (A) · 4555 - 1170 = 3385 (E) · 9297 - 4766 = 4531 (Y) · 9153 - 4491 = 4662 (H) · 11226 - 4355 = 6871 (D) · 5202 - 3983 = 1219 (F) · 8781 - 4746 = 4035 (I) · 12482 - 3540 = 8942 (W) · 4012 - 2896 = 1116 (R) · 6375 - 1557 = 4818 (N) · 1739 - 242 = 1497 (S) · 7041 - 2827 = 4214 (M) · 7402 - 4147 = 3255 (O)
Clue 4 (Multiplication facts (1-12)): "THE DETECTIVE FOUND BLUE FEATHERS"
9 × 2 = 18 (T) · 8 × 11 = 88 (B) · 11 × 7 = 77 (D) · 9 × 12 = 108 (R) · 2 × 2 = 4 (S) · 5 × 11 = 55 (C) · 11 × 4 = 44 (L) · 4 × 12 = 48 (I) · 2 × 1 = 2 (F) · 9 × 6 = 54 (A) · 9 × 7 = 63 (N) · 3 × 11 = 33 (O) · 9 × 8 = 72 (V) · 4 × 9 = 36 (E) · 6 × 7 = 42 (H) · 3 × 9 = 27 (U)
Clue 5 (Division facts (1-12)): surviving statement (box 6) → Titus
8 ÷ 4 = 2 · 55 ÷ 11 = 5 · 72 ÷ 6 = 12 · 88 ÷ 8 = 11 · 99 ÷ 11 = 9 · 64 ÷ 8 = 8 · 6 ÷ 6 = 1 · 36 ÷ 9 = 4 · 120 ÷ 12 = 10 · 3 ÷ 1 = 3 · 28 ÷ 4 = 7

About this mystery

Grade level: Grade 4 math
Math topics: Addition, Rounding, Subtraction, Multiplication, Division
Reading level: grades 3-4
Theme: The Great Dino-Valley Caper — set in Dino-Valley Rescue Center
Format: Interactive online & printable worksheet with answer key
Solution: One unique, verified culprit among 21 suspects

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