Grade 1Reading: grades 1-2Place valueAdditionSubtractionSkip countingMissing addends
The Great Dino Egg Hunt
Someone took the golden dinosaur egg from the camp tent! Our Dino Scouts must search the valley and find the sneaky camp bandit.
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 Gadget | Camp Badge | Writing Hand | Hat Color | Scared By |
|---|---|---|---|---|---|
| Sam | Lasso Rope | Wave Badge | left hand | blue hat | bright light |
| Mia | Mega Scope | Claw Badge | right hand | blue hat | silly song |
| Ben | Lasso Rope | Claw Badge | left hand | red hat | loud whistle |
| Cody | Super Net | Star Badge | left hand | blue hat | bright light |
| Marshall | Lasso Rope | Wave Badge | left hand | red hat | bright light |
| Steve | Mega Scope | Claw Badge | left hand | blue hat | bright light |
| Annie | Lasso Rope | Star Badge | left hand | red hat | loud whistle |
| Lily | Dino Treat | Star Badge | right hand | red hat | loud whistle |
| Luke | Map Tracker | Leaf Badge | right hand | red hat | bright light |
| Rex | Mega Scope | Leaf Badge | right hand | red hat | bright light |
| Zuma | Dino Treat | Star Badge | left hand | red hat | bright light |
| Zoe | Map Tracker | Star Badge | left hand | blue hat | bright light |
| Rocky | Lasso Rope | Star Badge | right hand | green hat | bright light |
| Diego | Super Net | Wave Badge | right hand | blue hat | bright light |
| Toby | Lasso Rope | Wave Badge | right hand | green hat | loud whistle |
| Bindi | Lasso Rope | Leaf Badge | right hand | green hat | loud whistle |
| Dora | Lasso Rope | Leaf Badge | left hand | blue hat | bright light |
| Ryder | Super Net | Sun Badge | left hand | blue hat | silly song |
| Chase | Dino Treat | Leaf Badge | left hand | blue hat | silly song |
| Ruby | Map Tracker | Claw Badge | left hand | blue hat | loud whistle |
| Skye | Dino Treat | Leaf Badge | left hand | red hat | loud whistle |
Clue 1
Place value
We found a secret paper with tens and ones blocks. Let us count the blocks to find 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
26
23
15
61
12
72
74
50
T
26
74
60
15
78
72
60
T
26
23
12
43
15
T
26
23
15
22
62
12
25
61
12
74
58
15
What number has 2 tens and 6 ones?T
What number has 2 tens and 3 ones?H
What number has 7 tens and 8 ones?S
What number has 6 tens and 0 ones?O
What number has 7 tens and 2 ones?N
What number has 5 tens and 0 ones?I
What number has 1 ten and 2 ones?A
What number has 6 tens and 2 ones?L
What number has 2 tens and 5 ones?W
What number has 1 ten and 5 ones?E
What number has 4 tens and 3 ones?V
What number has 2 tens and 2 ones?C
What number has 6 tens and 1 one?B
What number has 7 tens and 4 ones?D
What number has 5 tens and 8 ones?G
0/15 letters found
Clue 2
Addition
We need to pack our trail bags. Add the green apples and red apples to see how many we have.
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
19
18
10
13
18
12
6
8
2
12
13
4
7
T
9
20
3
7
T
9
18
10
20
7
T
9
19
T
9
19
18
16
18
14
T
9
19
12
13
4
6 + 3 =T
8 + 4 =A
4 + 3 =I
8 + 12 =W
9 + 5 =F
8 + 8 =L
1 + 3 =D
3 + 5 =Y
13 + 6 =H
3 + 7 =S
4 + 2 =K
10 + 3 =N
1 + 1 =B
2 + 1 =R
12 + 6 =E
0/15 letters found
Clue 3
Subtraction
A cute baby dino ate some of our camp biscuits. Subtract the ones he ate to see what is 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
11
15
5
19
8
17
3
1
T
11
2
7
17
16
8
4
8
10
9
2
12
13
8
19
2
1
18
15
T
11
6
1
18
15
T
11
19 - 8 =T
15 - 8 =U
16 - 4 =O
18 - 1 =N
20 - 1 =B
8 - 3 =E
10 - 8 =R
15 - 7 =A
2 - 1 =I
20 - 2 =G
17 - 8 =F
14 - 4 =Y
7 - 3 =W
5 - 2 =D
14 - 1 =M
19 - 3 =S
17 - 2 =H
10 - 4 =L
0/18 letters found
Clue 4
Skip counting
There are dino footprints in the mud. Let us count them by fives to follow the trail.
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
110
80
21
15
27
70
40
50
90
6
27
80
120
50
12
6
80
21
12
90
80
120
28
70
40
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130W
Skip-count by 2s. Fill the blank: 2, 4, ___, 8, 10L
Skip-count by 5s. Fill the blank: 5, 10, ___, 20, 25O
Skip-count by 3s. Fill the blank: 3, 6, 9, ___, 15, 18T
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110B
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, ___, 30, 32I
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, ___, 55, 60A
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33U
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27F
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100E
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140H
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, ___, 45, 50D
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, ___, 75, 80N
0/13 letters found
Clue 5
Missing addends — the last clue
We need ten camp lights for the dark cave. We only have six. Let us find out how many more we need.
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
9 + ___ = 20
9 + ___ = 13
7 + ___ = 8
8 + ___ = 20
8 + ___ = 14
9 + ___ = 11
10 + ___ = 13
1 + ___ = 8
2 + ___ = 7
6 + ___ = 15
8 + ___ = 16
Step 2 — cross out the sentence with each answer
1.The villain snatched the golden dino egg, then ran past the sleeping trex.
2.The villain opened the baby raptor cage, then zipped away on a scooter.
3.The villain swiped the ranger jeep keys, then crossed the muddy swamp.
4.The villain swiped the ranger jeep keys, then zipped away on a scooter.
5.The villain hid the camp map, then scrambled up the big rock wall.
6.The villain opened the baby raptor cage, then crossed the muddy swamp.
7.The villain took all the dino treats, then crossed the muddy swamp.
8.The villain swiped the ranger jeep keys, then ran past the sleeping trex.
9.The villain snatched the golden dino egg, then zipped away on a scooter.
10.The villain took all the dino treats, then ran past the sleeping trex.
11.The villain swiped the ranger jeep keys, then hid inside the hollow log.
12.The villain took all the dino treats, then hid inside the hollow log.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Great Dino Egg Hunt
Culprit: Zoe (Map Tracker · Star Badge · left hand · blue hat · bright light)
- Clue 1 (Place value): "THE BANDIT DOES NOT HAVE THE CLAW BADGE"What number has 2 tens and 6 ones? = 26 (T) · What number has 2 tens and 3 ones? = 23 (H) · What number has 7 tens and 8 ones? = 78 (S) · What number has 6 tens and 0 ones? = 60 (O) · What number has 7 tens and 2 ones? = 72 (N) · What number has 5 tens and 0 ones? = 50 (I) · What number has 1 ten and 2 ones? = 12 (A) · What number has 6 tens and 2 ones? = 62 (L) · What number has 2 tens and 5 ones? = 25 (W) · What number has 1 ten and 5 ones? = 15 (E) · What number has 4 tens and 3 ones? = 43 (V) · What number has 2 tens and 2 ones? = 22 (C) · What number has 6 tens and 1 one? = 61 (B) · What number has 7 tens and 4 ones? = 74 (D) · What number has 5 tens and 8 ones? = 58 (G)
- Clue 2 (Addition): "THE SNEAKY BANDIT WRITES WITH THE LEFT HAND"6 + 3 = 9 (T) · 8 + 4 = 12 (A) · 4 + 3 = 7 (I) · 8 + 12 = 20 (W) · 9 + 5 = 14 (F) · 8 + 8 = 16 (L) · 1 + 3 = 4 (D) · 3 + 5 = 8 (Y) · 13 + 6 = 19 (H) · 3 + 7 = 10 (S) · 4 + 2 = 6 (K) · 10 + 3 = 13 (N) · 1 + 1 = 2 (B) · 2 + 1 = 3 (R) · 12 + 6 = 18 (E)
- Clue 3 (Subtraction): "THE BANDIT RUNS AWAY FROM A BRIGHT LIGHT"19 - 8 = 11 (T) · 15 - 8 = 7 (U) · 16 - 4 = 12 (O) · 18 - 1 = 17 (N) · 20 - 1 = 19 (B) · 8 - 3 = 5 (E) · 10 - 8 = 2 (R) · 15 - 7 = 8 (A) · 2 - 1 = 1 (I) · 20 - 2 = 18 (G) · 17 - 8 = 9 (F) · 14 - 4 = 10 (Y) · 7 - 3 = 4 (W) · 5 - 2 = 3 (D) · 14 - 1 = 13 (M) · 19 - 3 = 16 (S) · 17 - 2 = 15 (H) · 10 - 4 = 6 (L)
- Clue 4 (Skip counting): "WE FOUND A BLUE HAT LEFT BEHIND"Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130 = 110 (W) · Skip-count by 2s. Fill the blank: 2, 4, ___, 8, 10 = 6 (L) · Skip-count by 5s. Fill the blank: 5, 10, ___, 20, 25 = 15 (O) · Skip-count by 3s. Fill the blank: 3, 6, 9, ___, 15, 18 = 12 (T) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110 = 90 (B) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, ___, 30, 32 = 28 (I) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, ___, 55, 60 = 50 (A) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33 = 27 (U) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27 = 21 (F) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100 = 80 (E) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140 = 120 (H) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, ___, 45, 50 = 40 (D) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, ___, 75, 80 = 70 (N)
- Clue 5 (Missing addends): surviving statement (box 10) → Zoe9 + ___ = 20 = 11 · 9 + ___ = 13 = 4 · 7 + ___ = 8 = 1 · 8 + ___ = 20 = 12 · 8 + ___ = 14 = 6 · 9 + ___ = 11 = 2 · 10 + ___ = 13 = 3 · 1 + ___ = 8 = 7 · 2 + ___ = 7 = 5 · 6 + ___ = 15 = 9 · 8 + ___ = 16 = 8
About this mystery
- Grade level
- Grade 1 math
- Math topics
- Place value, Addition, Subtraction, Skip counting, Missing addends
- Reading level
- grades 1-2
- Theme
- The Great Dino Egg Hunt — set in Dino Valley Camp
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects