🦕 DinosaursGrade 2Reading: grades 1-2AdditionSubtractionWord problemsMulti-step word problemsMissing addends
The Great Dino Valley Mystery
Someone took the golden fossil from the Dino Valley Museum! The Head Ranger needs your help to track down the sneaky Dino Rustler before the big dino parade begins.
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 Power | Super Skill | Footprint Type | Scale Color | Dino Weakness |
|---|---|---|---|---|---|
| Zelda | Pterodactyl Flight | Loud Roar | Right-Footed Tracks | Green Scales | Squeaky Toys |
| Rexy | T-Rex Stomp | Long Tail | Left-Footed Tracks | Green Scales | Flashlights |
| Lola | Raptor Speed | Spiky Back | Right-Footed Tracks | Brown Scales | Flashlights |
| Chomper | Ankylosaurus Smash | Loud Roar | Right-Footed Tracks | Blue Scales | Flashlights |
| Penny | Pterodactyl Flight | Loud Roar | Left-Footed Tracks | Green Scales | Squeaky Toys |
| Buster | Pterodactyl Flight | Spiky Back | Right-Footed Tracks | Brown Scales | Squeaky Toys |
| Jax | Pterodactyl Flight | Spiky Back | Left-Footed Tracks | Blue Scales | Squeaky Toys |
| Gus | Pterodactyl Flight | Loud Roar | Right-Footed Tracks | Blue Scales | Squeaky Toys |
| Milo | Pterodactyl Flight | Loud Roar | Right-Footed Tracks | Brown Scales | Squeaky Toys |
| Otis | Raptor Speed | Night Vision | Right-Footed Tracks | Brown Scales | Squeaky Toys |
| Nico | Raptor Speed | Loud Roar | Right-Footed Tracks | Brown Scales | Squeaky Toys |
| Pip | Ankylosaurus Smash | Sharp Eyes | Right-Footed Tracks | Green Scales | Sweet Berries |
| Petrie | Triceratops Shield | Spiky Back | Left-Footed Tracks | Green Scales | Sweet Berries |
| Steggy | Triceratops Shield | Long Tail | Left-Footed Tracks | Green Scales | Sweet Berries |
| Rocky | Pterodactyl Flight | Loud Roar | Left-Footed Tracks | Brown Scales | Squeaky Toys |
| Ducky | Ankylosaurus Smash | Long Tail | Left-Footed Tracks | Brown Scales | Sweet Berries |
| Trixie | Raptor Speed | Night Vision | Right-Footed Tracks | Green Scales | Squeaky Toys |
| Barney | Ankylosaurus Smash | Long Tail | Right-Footed Tracks | Brown Scales | Squeaky Toys |
| Spike | Pterodactyl Flight | Long Tail | Right-Footed Tracks | Green Scales | Flashlights |
| Ruby | Pterodactyl Flight | Spiky Back | Right-Footed Tracks | Green Scales | Sweet Berries |
| Daisy | Pterodactyl Flight | Long Tail | Left-Footed Tracks | Blue Scales | Flashlights |
Clue 1
Addition
Ranger Toby counts the muddy tracks. Let us add the small prints and the big prints to find the total.
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
62
26
63
86
23
42
T
62
40
63
86
92
22
63
42
55
22
T
62
26
58
53
63
58
40
22
55
97
T
62
58
77
40
30 + 32 =T
11 + 11 =O
68 + 29 =G
35 + 23 =A
24 + 31 =N
18 + 8 =H
20 + 33 =V
57 + 29 =R
9 + 14 =U
30 + 12 =S
19 + 44 =E
44 + 33 =I
55 + 37 =D
14 + 26 =L
0/14 letters found
Clue 2
Subtraction
The thief knocked over some dino treats. We must subtract the spilled treats to see how many are left.
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
69
68
22
17
27
22
58
33
80
54
34
27
50
17
T
69
22
63
63
22
54
37
34
T
69
68
T
69
68
22
73
34
78
68
T
69
53
50
50
T
69
86 - 17 =T
34 - 7 =N
55 - 33 =E
19 - 2 =S
112 - 39 =R
72 - 22 =O
47 - 14 =K
42 - 5 =W
94 - 36 =A
43 - 9 =I
110 - 32 =G
78 - 10 =H
81 - 18 =P
91 - 11 =Y
84 - 31 =F
76 - 22 =D
0/16 letters found
Clue 3
Word problems
A friendly triceratops has some shiny rocks. Let us solve her quick word puzzle to get the next clue.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Someonescaredthevillainoffwith .
S
20
7
38
37
8
36
30
T
O
30
S
20
Ranger Toby lined up 2 rows of 10 toy tracks. How many toy tracks in all?S
There were 41 toy tracks. 4 were used up. How many toy tracks are left?E
Ranger Toby lined up 6 rows of 5 dino treats. How many dino treats in all?Y
Ranger Toby found 5 shiny rocks yesterday and 2 more today. How many shiny rocks in all?Q
There were 39 water canteens. 3 were used up. How many water canteens are left?K
Ranger Toby found 20 water canteens yesterday and 18 more today. How many water canteens in all?U
Ranger Toby lined up 4 rows of 2 dino treats. How many dino treats in all?A
0/7 letters found
Clue 4
Multi-step word problems
The raptors found some fossil brushes in two different boxes. We need to do two quick steps to count them all.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Astrandof hairturnedupatthescene.
B
36
35
25
18
28
17
19
A
L
E
17
There were 292 dino treats in all. 4 dino treats were set aside. The rest were shared equally among 8 Dino Patrol. How many dino treats did each get?B
Ranger Toby collected 100 dino treats in the morning and 2 dino treats in the afternoon, then split them equally among 6 Dino Patrol. How many dino treats did each get?S
There were 176 fossil brushes in all. 24 fossil brushes were set aside. The rest were shared equally among 8 Dino Patrol. How many fossil brushes did each get?C
Ranger Toby collected 26 water canteens in the morning and 74 water canteens in the afternoon, then split them equally among 4 Dino Patrol. How many water canteens did each get?O
Ranger Toby collected 68 water canteens in the morning and 2 water canteens in the afternoon, then split them equally among 2 Dino Patrol. How many water canteens did each get?R
There were 255 shiny rocks in all. 3 shiny rocks were set aside. The rest were shared equally among 9 Dino Patrol. How many shiny rocks did each get?N
Ranger Toby collected 64 water canteens in the morning and 26 water canteens in the afternoon, then split them equally among 5 Dino Patrol. How many water canteens did each get?W
0/7 letters found
Clue 5
Missing addends — the last clue
We have some water canteens but we need more to fill the bag. Find the missing number to open the locked box.
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
4 + ___ = 15
6 + ___ = 16
9 + ___ = 13
2 + ___ = 4
6 + ___ = 18
6 + ___ = 14
3 + ___ = 9
9 + ___ = 16
2 + ___ = 5
2 + ___ = 3
8 + ___ = 17
Step 2 — cross out the sentence with each answer
1.The villain shakes the ground with a t-rex stomp, then spots the guards with sharp eyes.
2.The villain shakes the ground with a t-rex stomp, then lets out a loud roar.
3.The villain dashes past the trees with raptor speed, then spots the guards with sharp eyes.
4.The villain dashes past the trees with raptor speed, then sneaks in the dark with night vision.
5.The villain dashes past the trees with raptor speed, then lets out a loud roar.
6.The villain breaks the museum door with an ankylosaurus smash, then spots the guards with sharp eyes.
7.The villain blocks the path with a triceratops shield, then swipes the prize with a long tail.
8.The villain shakes the ground with a t-rex stomp, then sneaks in the dark with night vision.
9.The villain blocks the path with a triceratops shield, then spots the guards with sharp eyes.
10.The villain soars high up with pterodactyl flight, then knocks down a tree with a spiky back.
11.The villain soars high up with pterodactyl flight, then lets out a loud roar.
12.The villain breaks the museum door with an ankylosaurus smash, then sneaks in the dark with night vision.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Great Dino Valley Mystery
Culprit: Nico (Raptor Speed · Loud Roar · Right-Footed Tracks · Brown Scales · Squeaky Toys)
- Clue 1 (Addition): "THE RUSTLER DOES NOT HAVE A LONG TAIL"30 + 32 = 62 (T) · 11 + 11 = 22 (O) · 68 + 29 = 97 (G) · 35 + 23 = 58 (A) · 24 + 31 = 55 (N) · 18 + 8 = 26 (H) · 20 + 33 = 53 (V) · 57 + 29 = 86 (R) · 9 + 14 = 23 (U) · 30 + 12 = 42 (S) · 19 + 44 = 63 (E) · 44 + 33 = 77 (I) · 55 + 37 = 92 (D) · 14 + 26 = 40 (L)
- Clue 2 (Subtraction): "THE SNEAKY DINO STEPPED WITH THE RIGHT FOOT"86 - 17 = 69 (T) · 34 - 7 = 27 (N) · 55 - 33 = 22 (E) · 19 - 2 = 17 (S) · 112 - 39 = 73 (R) · 72 - 22 = 50 (O) · 47 - 14 = 33 (K) · 42 - 5 = 37 (W) · 94 - 36 = 58 (A) · 43 - 9 = 34 (I) · 110 - 32 = 78 (G) · 78 - 10 = 68 (H) · 81 - 18 = 63 (P) · 91 - 11 = 80 (Y) · 84 - 31 = 53 (F) · 76 - 22 = 54 (D)
- Clue 3 (Word problems): "SQUEAKY TOYS"Ranger Toby lined up 2 rows of 10 toy tracks. How many toy tracks in all? = 20 (S) · There were 41 toy tracks. 4 were used up. How many toy tracks are left? = 37 (E) · Ranger Toby lined up 6 rows of 5 dino treats. How many dino treats in all? = 30 (Y) · Ranger Toby found 5 shiny rocks yesterday and 2 more today. How many shiny rocks in all? = 7 (Q) · There were 39 water canteens. 3 were used up. How many water canteens are left? = 36 (K) · Ranger Toby found 20 water canteens yesterday and 18 more today. How many water canteens in all? = 38 (U) · Ranger Toby lined up 4 rows of 2 dino treats. How many dino treats in all? = 8 (A)
- Clue 4 (Multi-step word problems): "BROWN SCALES"There were 292 dino treats in all. 4 dino treats were set aside. The rest were shared equally among 8 Dino Patrol. How many dino treats did each get? = 36 (B) · Ranger Toby collected 100 dino treats in the morning and 2 dino treats in the afternoon, then split them equally among 6 Dino Patrol. How many dino treats did each get? = 17 (S) · There were 176 fossil brushes in all. 24 fossil brushes were set aside. The rest were shared equally among 8 Dino Patrol. How many fossil brushes did each get? = 19 (C) · Ranger Toby collected 26 water canteens in the morning and 74 water canteens in the afternoon, then split them equally among 4 Dino Patrol. How many water canteens did each get? = 25 (O) · Ranger Toby collected 68 water canteens in the morning and 2 water canteens in the afternoon, then split them equally among 2 Dino Patrol. How many water canteens did each get? = 35 (R) · There were 255 shiny rocks in all. 3 shiny rocks were set aside. The rest were shared equally among 9 Dino Patrol. How many shiny rocks did each get? = 28 (N) · Ranger Toby collected 64 water canteens in the morning and 26 water canteens in the afternoon, then split them equally among 5 Dino Patrol. How many water canteens did each get? = 18 (W)
- Clue 5 (Missing addends): surviving statement (box 5) → Nico4 + ___ = 15 = 11 · 6 + ___ = 16 = 10 · 9 + ___ = 13 = 4 · 2 + ___ = 4 = 2 · 6 + ___ = 18 = 12 · 6 + ___ = 14 = 8 · 3 + ___ = 9 = 6 · 9 + ___ = 16 = 7 · 2 + ___ = 5 = 3 · 2 + ___ = 3 = 1 · 8 + ___ = 17 = 9
About this mystery
- Grade level
- Grade 2 math
- Math topics
- Addition, Subtraction, Word problems, Multi-step word problems, Missing addends
- Reading level
- grades 1-2
- Theme
- The Great Dino Valley Mystery — set in Dino Valley Park
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects