Grade 1Reading: grades 1-2AdditionSkip countingSubtractionPlace valueMissing addends
The Secret Map Snatcher
Someone took the golden treasure map from the main treehouse! Solve the camp clues to track down the sneaky thief.
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 | Camp Gadget | Scout Badge | Dominant Hand | Wig Style | Secret Trap |
|---|---|---|---|---|---|
| Noah | Net Shooter | Bear Badge | Left-handed | Spiky Wig | Loud Whistle |
| Milo | Flashlight Cannon | Tiger Badge | Left-handed | Spiky Wig | Lemon Juice |
| Sammy | Bubble Blaster | Bear Badge | Left-handed | Braided Wig | Lemon Juice |
| Lucas | Net Shooter | Bear Badge | Right-handed | Braided Wig | Lemon Juice |
| Jack | Net Shooter | Bear Badge | Right-handed | Spiky Wig | Shiny Mirror |
| Eli | Bubble Blaster | Bear Badge | Right-handed | Braided Wig | Shiny Mirror |
| Mia | Rope Launcher | Eagle Badge | Right-handed | Spiky Wig | Lemon Juice |
| Maya | Flashlight Cannon | Eagle Badge | Left-handed | Spiky Wig | Lemon Juice |
| Kai | Bubble Blaster | Tiger Badge | Left-handed | Spiky Wig | Lemon Juice |
| Emma | Bubble Blaster | Shark Badge | Left-handed | Braided Wig | Loud Whistle |
| Finn | Flashlight Cannon | Bear Badge | Left-handed | Spiky Wig | Lemon Juice |
| Alex | Net Shooter | Shark Badge | Left-handed | Curly Wig | Lemon Juice |
| Luna | Grape Lasso | Wolf Badge | Left-handed | Spiky Wig | Loud Whistle |
| Zoe | Bubble Blaster | Wolf Badge | Right-handed | Braided Wig | Loud Whistle |
| Chloe | Flashlight Cannon | Shark Badge | Left-handed | Spiky Wig | Lemon Juice |
| Leo | Rope Launcher | Bear Badge | Right-handed | Braided Wig | Shiny Mirror |
| Liam | Grape Lasso | Eagle Badge | Left-handed | Curly Wig | Lemon Juice |
| Ivy | Grape Lasso | Shark Badge | Right-handed | Curly Wig | Loud Whistle |
| Caleb | Rope Launcher | Eagle Badge | Right-handed | Braided Wig | Loud Whistle |
| Ella | Grape Lasso | Bear Badge | Right-handed | Curly Wig | Shiny Mirror |
| Aria | Bubble Blaster | Bear Badge | Right-handed | Braided Wig | Lemon Juice |
Clue 1
Addition
Count all the camp flags to decode 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
15
12
16
2
5
4
4
8
5
17
3
10
16
14
17
10
T
15
20
16
8
7
8
13
16
8
7
13
8
3
11
16
11 + 4 =T
1 + 1 =V
1 + 3 =L
8 + 8 =E
8 + 12 =W
8 + 9 =N
9 + 3 =H
3 + 4 =R
3 + 5 =A
4 + 10 =S
2 + 1 =D
1 + 4 =I
5 + 5 =O
9 + 4 =B
7 + 4 =G
0/15 letters found
Clue 2
Skip counting
Count by twos along the stepping stones to find 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.
A
8
26
55
90
6
39
12
12
12
A
8
26
90
65
39
14
26
45
55
90
39
26
55
90
65
90
65
39
55
45
18
39
42
90
65
A
8
6
36
Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12A
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, ___, 16, 18M
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75H
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42D
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65I
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110T
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48F
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30W
Skip-count by 2s. Fill the blank: 2, 4, ___, 8, 10N
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ___, 42, 45E
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, ___, 20, 22L
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16S
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55R
0/13 letters found
Clue 3
Subtraction
Take away the broken compasses to reveal the secret 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
7
17
18
9
11
18
4
15
14
6
11
9
4
10
4
1
2
14
13
16
9
13
6
14
19
18
16
13
11
5
6
8
12
18
16 - 9 =T
11 - 2 =S
20 - 2 =E
19 - 2 =H
20 - 7 =O
19 - 4 =K
17 - 1 =M
18 - 8 =W
15 - 9 =U
20 - 9 =N
20 - 6 =R
13 - 1 =C
9 - 4 =J
12 - 8 =A
13 - 5 =I
6 - 4 =F
20 - 1 =L
5 - 4 =Y
0/18 letters found
Clue 4
Place value
Look at the tens and ones on the trail sign for a 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
91
49
13
90
95
13
58
48
22
21
81
71
71
13
22
90
71
73
48
54
49
58
73
21
58
T
91
T
91
49
13
T
91
21
13
13
What number has 9 tens and 1 one?T
What number has 2 tens and 1 one?R
What number has 4 tens and 8 ones?K
What number has 2 tens and 2 ones?D
What number has 4 tens and 9 ones?H
What number has 7 tens and 1 one?P
What number has 8 tens and 1 one?O
What number has 7 tens and 3 ones?I
What number has 5 tens and 8 ones?A
What number has 9 tens and 5 ones?N
What number has 9 tens and 0 ones?S
What number has 1 ten and 3 ones?E
What number has 5 tens and 4 ones?Y
0/13 letters found
Clue 5
Missing addends — the last clue
Find the missing number of map pieces to solve the 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
7 + ___ = 13
10 + ___ = 19
8 + ___ = 13
3 + ___ = 10
10 + ___ = 11
7 + ___ = 11
10 + ___ = 13
4 + ___ = 6
4 + ___ = 14
3 + ___ = 11
7 + ___ = 18
Step 2 — cross out the sentence with each answer
1.The villain fired a rope launcher, then wore a shark badge.
2.The villain blasted a bubble blaster, then wore a shark badge.
3.The villain fired a rope launcher, then displayed a wolf badge.
4.The villain fired a rope launcher, then showed an eagle badge.
5.The villain shined a flashlight cannon, then showed an eagle badge.
6.The villain blasted a bubble blaster, then flashed a tiger badge.
7.The villain fired a rope launcher, then flashed a tiger badge.
8.The villain launched a net shooter, then pinned on a bear badge.
9.The villain shined a flashlight cannon, then flashed a tiger badge.
10.The villain blasted a bubble blaster, then showed an eagle badge.
11.The villain fired a rope launcher, then pinned on a bear badge.
12.The villain shined a flashlight cannon, then wore a shark badge.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Secret Map Snatcher
Culprit: Chloe (Flashlight Cannon · Shark Badge · Left-handed · Spiky Wig · Lemon Juice)
- Clue 1 (Addition): "THE VILLAIN DOES NOT WEAR A BEAR BADGE"11 + 4 = 15 (T) · 1 + 1 = 2 (V) · 1 + 3 = 4 (L) · 8 + 8 = 16 (E) · 8 + 12 = 20 (W) · 8 + 9 = 17 (N) · 9 + 3 = 12 (H) · 3 + 4 = 7 (R) · 3 + 5 = 8 (A) · 4 + 10 = 14 (S) · 2 + 1 = 3 (D) · 1 + 4 = 5 (I) · 5 + 5 = 10 (O) · 9 + 4 = 13 (B) · 7 + 4 = 11 (G)
- Clue 2 (Skip counting): "A WITNESS SAW THEM WRITE WITH THEIR LEFT HAND"Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12 = 8 (A) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, ___, 16, 18 = 14 (M) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75 = 65 (H) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42 = 36 (D) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65 = 55 (I) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110 = 90 (T) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48 = 42 (F) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30 = 26 (W) · Skip-count by 2s. Fill the blank: 2, 4, ___, 8, 10 = 6 (N) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ___, 42, 45 = 39 (E) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, ___, 20, 22 = 18 (L) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16 = 12 (S) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55 = 45 (R)
- Clue 3 (Subtraction): "THE SNEAK RUNS AWAY FROM SOUR LEMON JUICE"16 - 9 = 7 (T) · 11 - 2 = 9 (S) · 20 - 2 = 18 (E) · 19 - 2 = 17 (H) · 20 - 7 = 13 (O) · 19 - 4 = 15 (K) · 17 - 1 = 16 (M) · 18 - 8 = 10 (W) · 15 - 9 = 6 (U) · 20 - 9 = 11 (N) · 20 - 6 = 14 (R) · 13 - 1 = 12 (C) · 9 - 4 = 5 (J) · 12 - 8 = 4 (A) · 13 - 5 = 8 (I) · 6 - 4 = 2 (F) · 20 - 1 = 19 (L) · 5 - 4 = 1 (Y)
- Clue 4 (Place value): "THE SNEAK DROPPED SPIKY HAIR AT THE TREE"What number has 9 tens and 1 one? = 91 (T) · What number has 2 tens and 1 one? = 21 (R) · What number has 4 tens and 8 ones? = 48 (K) · What number has 2 tens and 2 ones? = 22 (D) · What number has 4 tens and 9 ones? = 49 (H) · What number has 7 tens and 1 one? = 71 (P) · What number has 8 tens and 1 one? = 81 (O) · What number has 7 tens and 3 ones? = 73 (I) · What number has 5 tens and 8 ones? = 58 (A) · What number has 9 tens and 5 ones? = 95 (N) · What number has 9 tens and 0 ones? = 90 (S) · What number has 1 ten and 3 ones? = 13 (E) · What number has 5 tens and 4 ones? = 54 (Y)
- Clue 5 (Missing addends): surviving statement (box 12) → Chloe7 + ___ = 13 = 6 · 10 + ___ = 19 = 9 · 8 + ___ = 13 = 5 · 3 + ___ = 10 = 7 · 10 + ___ = 11 = 1 · 7 + ___ = 11 = 4 · 10 + ___ = 13 = 3 · 4 + ___ = 6 = 2 · 4 + ___ = 14 = 10 · 3 + ___ = 11 = 8 · 7 + ___ = 18 = 11
About this mystery
- Grade level
- Grade 1 math
- Math topics
- Addition, Skip counting, Subtraction, Place value, Missing addends
- Reading level
- grades 1-2
- Theme
- The Secret Map Snatcher — set in Whispering Woods Treehouse
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects