🦕 DinosaursGrade 1Reading: grades 3-4AdditionSubtractionSkip countingPlace valueMissing addends
The Great Dinosaur Egg Hunt
Someone has sneaked into the sanctuary and snatched the priceless golden T-Rex egg! The Dino Patrol needs your help to track down the thief and return the egg safely before it hatches.
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 Suit | Pocket Tool | Footprint Stance | Helmet Style | Distraction |
|---|---|---|---|---|---|
| Marnie Maiasaur | Pterodactyl Wings | Laser Pointer | Left-footed prints | Orange Feather Cap | Shiny Gold Coins |
| Daisy Diplodocus | T-Rex Mask | Laser Pointer | Left-footed prints | Orange Feather Cap | Squeaky Toys |
| Digby Drake | Ankylosaurus Tail | Walkie Talkie | Left-footed prints | Green Spiky Wig | Shiny Gold Coins |
| Fossil Fiona | Triceratops Horns | Walkie Talkie | Right-footed prints | Orange Feather Cap | Squeaky Toys |
| Toby Tricera | Pterodactyl Wings | Magnifying Glass | Right-footed prints | Blue Raptor Helmet | Squeaky Toys |
| Pip Pteranodon | Triceratops Horns | Laser Pointer | Right-footed prints | Blue Raptor Helmet | Shiny Gold Coins |
| Al Raptor | Pterodactyl Wings | Digging Shovel | Left-footed prints | Green Spiky Wig | Smelly Ferns |
| Tracker Trish | Triceratops Horns | Walkie Talkie | Left-footed prints | Orange Feather Cap | Squeaky Toys |
| Ranger Rex | Pterodactyl Wings | Flashlight | Left-footed prints | Orange Feather Cap | Squeaky Toys |
| Spike Spinax | Triceratops Horns | Flashlight | Right-footed prints | Orange Feather Cap | Shiny Gold Coins |
| Clara Clay | Ankylosaurus Tail | Digging Shovel | Right-footed prints | Orange Feather Cap | Shiny Gold Coins |
| Steggy Sue | T-Rex Mask | Walkie Talkie | Right-footed prints | Orange Feather Cap | Squeaky Toys |
| Alan Grant | Pterodactyl Wings | Digging Shovel | Left-footed prints | Green Spiky Wig | Squeaky Toys |
| Rocky Ridge | T-Rex Mask | Digging Shovel | Right-footed prints | Orange Feather Cap | Squeaky Toys |
| Owen Raptor | Pterodactyl Wings | Magnifying Glass | Right-footed prints | Green Spiky Wig | Smelly Ferns |
| Rexie Rivera | Pterodactyl Wings | Walkie Talkie | Right-footed prints | Green Spiky Wig | Smelly Ferns |
| Ellie Sattler | T-Rex Mask | Walkie Talkie | Left-footed prints | Green Spiky Wig | Smelly Ferns |
| Val Velociraptor | T-Rex Mask | Walkie Talkie | Left-footed prints | Orange Feather Cap | Smelly Ferns |
| Barney Basilisk | Triceratops Horns | Digging Shovel | Left-footed prints | Orange Feather Cap | Squeaky Toys |
| Gerry Geode | T-Rex Mask | Flashlight | Left-footed prints | Green Spiky Wig | Shiny Gold Coins |
| Penny Raptor | T-Rex Mask | Flashlight | Left-footed prints | Orange Feather Cap | Squeaky Toys |
Clue 1
Addition
Ranger Rex found two piles of sharp raptor teeth on the trail. We must add the piles together to find the total teeth and unlock the 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.
T
9
16
14
10
7
10
11
14
17
T
9
3
19
14
10
5
19
T
9
7
10
14
4
2
4
10
14
6
11
19
20
5
T
9
14
6
3 + 6 =T
1 + 2 =D
3 + 2 =N
9 + 7 =H
13 + 7 =I
3 + 4 =U
6 + 4 =S
1 + 1 =L
6 + 5 =P
12 + 7 =O
4 + 2 =R
6 + 8 =E
10 + 7 =C
2 + 2 =A
0/14 letters found
Clue 2
Subtraction
We had a basket of fresh ferns, but a hungry stegosaurus ate some of them! Subtract the eaten ferns to see what remains and reveal the next 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.
T
14
2
11
19
1
1
T
14
13
5
6
10
T
14
4
4
2
1
17
9
15
11
19
T
14
15
11
9
10
6
10
12
4
T
14
9
10
7
11
16 - 2 =T
14 - 1 =P
13 - 2 =E
7 - 2 =R
13 - 1 =G
20 - 5 =L
18 - 1 =W
20 - 1 =F
12 - 6 =I
5 - 3 =H
3 - 2 =O
11 - 2 =A
10 - 6 =S
8 - 1 =C
19 - 9 =N
0/15 letters found
Clue 3
Skip counting
The bandit left tracks in even rows. Count the footprints by twos to follow the path and uncover the suspect's weakness.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
S
130
50
6
10
22
24
35
65
100
35
S
130
22
9
60
22
35
S
130
S
130
27
22
55
10
65
40
16
S
130
26
16
9
9
22
16
12
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150S
Skip-count by 2s. Fill the blank: 2, 4, ___, 8, 10U
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26A
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, ___, 65, 70W
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, ___, 60, 70Q
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30V
Skip-count by 10s. Fill the blank: 10, 20, 30, ___, 50, 60H
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20I
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45Y
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120O
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75T
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33C
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16N
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, ___, 27, 30K
Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15L
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65R
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14E
0/17 letters found
Clue 4
Place value
Our digital fossil scanner displays the power levels in tens and ones. Group the blocks to read the correct code and get the hair 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.
W
70
18
87
47
40
85
54
41
85
47
33
41
85
64
18
87
18
41
62
51
18
33
41
62
62
51
18
54
68
64
What number has 7 tens and 0 ones?W
What number has 8 tens and 7 ones?F
What number has 6 tens and 8 ones?I
What number has 5 tens and 1 one?H
What number has 1 ten and 8 ones?E
What number has 4 tens and 0 ones?U
What number has 5 tens and 4 ones?D
What number has 6 tens and 4 ones?G
What number has 4 tens and 1 one?A
What number has 8 tens and 5 ones?N
What number has 4 tens and 7 ones?O
What number has 3 tens and 3 ones?R
What number has 6 tens and 2 ones?T
0/13 letters found
Clue 5
Missing addends — the last clue
Our egg-carrying case needs ten soft leaves to cushion the egg, but we only have a few. Find how many more leaves we need to finish the case and get the last 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
2 + ___ = 5
7 + ___ = 15
6 + ___ = 16
9 + ___ = 21
6 + ___ = 8
2 + ___ = 13
7 + ___ = 11
1 + ___ = 8
4 + ___ = 10
10 + ___ = 15
10 + ___ = 19
Step 2 — cross out the sentence with each answer
1.The villain roared like a mighty rex, then blew a loud warning whistle.
2.The villain chomped on giant green leaves, then scared away a baby triceratops.
3.The villain swung a heavy spiked tail, then shined a bright light on the wall.
4.The villain chomped on giant green leaves, then shined a bright light on the wall.
5.The villain swung a heavy spiked tail, then blew a loud warning whistle.
6.The villain stomped through the deep mud, then lost a gold digging shovel.
7.The villain stomped through the deep mud, then blew a loud warning whistle.
8.The villain dashed past the fossil cave, then blew a loud warning whistle.
9.The villain stomped through the deep mud, then dropped a map of the sanctuary.
10.The villain swung a heavy spiked tail, then scared away a baby triceratops.
11.The villain chomped on giant green leaves, then dropped a map of the sanctuary.
12.The villain stomped through the deep mud, then shined a bright light on the wall.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Great Dinosaur Egg Hunt
Culprit: Penny Raptor (T-Rex Mask · Flashlight · Left-footed prints · Orange Feather Cap · Squeaky Toys)
- Clue 1 (Addition): "THE SUSPECT DOES NOT USE A LASER POINTER"3 + 6 = 9 (T) · 1 + 2 = 3 (D) · 3 + 2 = 5 (N) · 9 + 7 = 16 (H) · 13 + 7 = 20 (I) · 3 + 4 = 7 (U) · 6 + 4 = 10 (S) · 1 + 1 = 2 (L) · 6 + 5 = 11 (P) · 12 + 7 = 19 (O) · 4 + 2 = 6 (R) · 6 + 8 = 14 (E) · 10 + 7 = 17 (C) · 2 + 2 = 4 (A)
- Clue 2 (Subtraction): "THE FOOTPRINTS SHOW A LEFT LEANING STANCE"16 - 2 = 14 (T) · 14 - 1 = 13 (P) · 13 - 2 = 11 (E) · 7 - 2 = 5 (R) · 13 - 1 = 12 (G) · 20 - 5 = 15 (L) · 18 - 1 = 17 (W) · 20 - 1 = 19 (F) · 12 - 6 = 6 (I) · 5 - 3 = 2 (H) · 3 - 2 = 1 (O) · 11 - 2 = 9 (A) · 10 - 6 = 4 (S) · 8 - 1 = 7 (C) · 19 - 9 = 10 (N)
- Clue 3 (Skip counting): "SQUEAKY TOYS ALWAYS SCARE THIS VILLAIN"Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150 = 130 (S) · Skip-count by 2s. Fill the blank: 2, 4, ___, 8, 10 = 6 (U) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26 = 22 (A) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, ___, 65, 70 = 60 (W) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, ___, 60, 70 = 50 (Q) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30 = 26 (V) · Skip-count by 10s. Fill the blank: 10, 20, 30, ___, 50, 60 = 40 (H) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20 = 16 (I) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45 = 35 (Y) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120 = 100 (O) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75 = 65 (T) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33 = 27 (C) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16 = 12 (N) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, ___, 27, 30 = 24 (K) · Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15 = 9 (L) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65 = 55 (R) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14 = 10 (E)
- Clue 4 (Place value): "WE FOUND AN ORANGE FEATHER AT THE DIG"What number has 7 tens and 0 ones? = 70 (W) · What number has 8 tens and 7 ones? = 87 (F) · What number has 6 tens and 8 ones? = 68 (I) · What number has 5 tens and 1 one? = 51 (H) · What number has 1 ten and 8 ones? = 18 (E) · What number has 4 tens and 0 ones? = 40 (U) · What number has 5 tens and 4 ones? = 54 (D) · What number has 6 tens and 4 ones? = 64 (G) · What number has 4 tens and 1 one? = 41 (A) · What number has 8 tens and 5 ones? = 85 (N) · What number has 4 tens and 7 ones? = 47 (O) · What number has 3 tens and 3 ones? = 33 (R) · What number has 6 tens and 2 ones? = 62 (T)
- Clue 5 (Missing addends): surviving statement (box 1) → Penny Raptor2 + ___ = 5 = 3 · 7 + ___ = 15 = 8 · 6 + ___ = 16 = 10 · 9 + ___ = 21 = 12 · 6 + ___ = 8 = 2 · 2 + ___ = 13 = 11 · 7 + ___ = 11 = 4 · 1 + ___ = 8 = 7 · 4 + ___ = 10 = 6 · 10 + ___ = 15 = 5 · 10 + ___ = 19 = 9
About this mystery
- Grade level
- Grade 1 math
- Math topics
- Addition, Subtraction, Skip counting, Place value, Missing addends
- Reading level
- grades 3-4
- Theme
- The Great Dinosaur Egg Hunt — set in The Great Valley Dino Sanctuary
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects