Grade 4Reading: grades 1-2Place valueRoundingAdditionSubtractionDivision
The Treehouse Map Mystery
Someone took the Golden Island Map from the Treehouse Club! We need to find the Map Snatcher before the ferry leaves.
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 | Explorer Gear | Best Skill | Writing Hand | Hair Color | How to Stop |
|---|---|---|---|---|---|
| Mia | Golden Compass | Rope Swings | Left Handed Writer | Yellow Hair | Squeaky Toys |
| Meg | Golden Compass | Map Reading | Left Handed Writer | Brown Hair | Tickle Feathers |
| Ben | Grappling Hook | Rope Swings | Left Handed Writer | Black Hair | Flashlight Beam |
| Sam | Decoder Ring | Rope Swings | Right Handed Writer | Brown Hair | Squeaky Toys |
| Fay | Spyglass | Tree Climbing | Right Handed Writer | Yellow Hair | Squeaky Toys |
| Dan | Spyglass | Quick Digging | Left Handed Writer | Black Hair | Flashlight Beam |
| Eli | Decoder Ring | Map Reading | Left Handed Writer | Black Hair | Flashlight Beam |
| Kai | Grappling Hook | Map Reading | Right Handed Writer | Yellow Hair | Tickle Feathers |
| Tom | Flashlight | Quick Digging | Right Handed Writer | Black Hair | Squeaky Toys |
| Leo | Golden Compass | Tree Climbing | Left Handed Writer | Black Hair | Squeaky Toys |
| Max | Grappling Hook | Quick Digging | Left Handed Writer | Yellow Hair | Tickle Feathers |
| Jax | Flashlight | Quick Digging | Left Handed Writer | Black Hair | Squeaky Toys |
| Kim | Grappling Hook | Fast Running | Left Handed Writer | Black Hair | Flashlight Beam |
| Ada | Decoder Ring | Rope Swings | Left Handed Writer | Black Hair | Tickle Feathers |
| Amy | Grappling Hook | Map Reading | Left Handed Writer | Black Hair | Flashlight Beam |
| Gus | Golden Compass | Rope Swings | Left Handed Writer | Black Hair | Squeaky Toys |
| Zoe | Grappling Hook | Tree Climbing | Left Handed Writer | Brown Hair | Tickle Feathers |
| Ted | Flashlight | Rope Swings | Right Handed Writer | Black Hair | Flashlight Beam |
| Joy | Golden Compass | Rope Swings | Right Handed Writer | Black Hair | Squeaky Toys |
| Ivy | Golden Compass | Map Reading | Left Handed Writer | Yellow Hair | Flashlight Beam |
| Eve | Grappling Hook | Map Reading | Left Handed Writer | Yellow Hair | Flashlight Beam |
Clue 1
Place value
We found a secret code on the treehouse lock. Let us look at the place value of the digits.
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
10
50
60
3000
2000
600
T
10
700
50
60
70
700
600
2000
2000
800
T
10
7000
800
1000
8000
80
700
400
7000
80
20
20
80
2000
20
What is the value of the 1 in 7,318?T
What is the value of the 2 in 2,000?N
What is the value of the 4 in 498?K
What is the value of the 7 in 3,712?C
What is the value of the 8 in 801?O
What is the value of the 6 in 2,461?E
What is the value of the 1 in 1,292?Q
What is the value of the 2 in 420?G
What is the value of the 5 in 459?H
What is the value of the 3 in 3,979?S
What is the value of the 7 in 2,171?R
What is the value of the 6 in 654?A
What is the value of the 8 in 8,347?U
What is the value of the 8 in 7,181?I
What is the value of the 7 in 17,449?D
0/15 letters found
Clue 2
Rounding
Our old compass only shows rounded numbers. We must round the distance to find the path.
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
4300
300
3000
9000
500
2300
T
4300
90
300
3000
20
200
20
70
T
4300
3000
9000
200
70
T
4300
300
T
4300
300
3000
290
3000
30
T
4300
300
2300
500
1300
Round 4,290 to the nearest hundredT
Round 23 to the nearest tenR
Round 68 to the nearest tenI
Round 1,267 to the nearest hundredD
Round 26 to the nearest tenF
Round 505 to the nearest hundredN
Round 234 to the nearest hundredW
Round 9,071 to the nearest thousandS
Round 90 to the nearest tenC
Round 2,326 to the nearest hundredA
Round 292 to the nearest tenL
Round 3,217 to the nearest thousandE
Round 327 to the nearest hundredH
0/13 letters found
Clue 3
Addition
We need to add up all the shiny gold coins we found in the grass to get the next hint.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
U
5489
8875
3960
8863
4165
9736
5389
6562
8703
3688
4165
3960
8863
3016
3688
6779
8875
3688
6779
4822
3688
8703
3960
3016
2464 + 3025 =U
3322 + 3240 =G
2966 + 5737 =H
1881 + 3508 =I
1548 + 2140 =T
1821 + 1195 =M
1824 + 2998 =P
4357 + 2422 =O
1578 + 2382 =E
3918 + 4945 =A
4500 + 4375 =S
4810 + 4926 =R
2530 + 1635 =B
0/13 letters found
Clue 4
Subtraction
The map says to take steps back. Subtract the smaller steps from the big steps now.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
B
1268
5312
8423
2472
2587
1702
4224
4248
8423
7263
3081
1702
8476
4704
4248
4704
5312
4704
3392
4224
8146
7263
4224
4309
4704
8786
8423
2311
1836 - 568 =B
5209 - 3507 =S
7424 - 3115 =H
6235 - 2843 =F
5805 - 1557 =R
10691 - 2545 =O
3398 - 1087 =P
7307 - 4720 =K
10941 - 3678 =N
6175 - 3703 =C
11750 - 3274 =W
6666 - 3585 =D
9061 - 4357 =E
5827 - 1603 =T
9170 - 384 =M
10127 - 1704 =A
6661 - 1349 =L
0/17 letters found
Clue 5
Division facts (1-12) — the last clue
We must share our apple slices equally. Divide them up to fuel our search.
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
108 ÷ 12 = ?
64 ÷ 8 = ?
48 ÷ 8 = ?
21 ÷ 7 = ?
6 ÷ 6 = ?
66 ÷ 6 = ?
6 ÷ 3 = ?
120 ÷ 10 = ?
45 ÷ 9 = ?
12 ÷ 3 = ?
56 ÷ 8 = ?
Step 2 — cross out the sentence with each answer
1.The villain jumps over the creek, then leaves a muddy boot print.
2.The villain zips down the slide, then snaps a small twig.
3.The villain swings on a vine, then snaps a small twig.
4.The villain sneaks past the tent, then drops a green leaf.
5.The villain sneaks past the tent, then leaves a muddy boot print.
6.The villain jumps over the creek, then loses a yellow badge.
7.The villain climbs up the ladder, then loses a yellow badge.
8.The villain swings on a vine, then leaves a muddy boot print.
9.The villain swings on a vine, then loses a yellow badge.
10.The villain swings on a vine, then drops a green leaf.
11.The villain climbs up the ladder, then drops a shiny coin.
12.The villain jumps over the creek, then snaps a small twig.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Treehouse Map Mystery
Culprit: Ben (Grappling Hook · Rope Swings · Left Handed Writer · Black Hair · Flashlight Beam)
- Clue 1 (Place value): "THE SNATCHER CANNOT DO QUICK DIGGING"What is the value of the 1 in 7,318? = 10 (T) · What is the value of the 2 in 2,000? = 2000 (N) · What is the value of the 4 in 498? = 400 (K) · What is the value of the 7 in 3,712? = 700 (C) · What is the value of the 8 in 801? = 800 (O) · What is the value of the 6 in 2,461? = 60 (E) · What is the value of the 1 in 1,292? = 1000 (Q) · What is the value of the 2 in 420? = 20 (G) · What is the value of the 5 in 459? = 50 (H) · What is the value of the 3 in 3,979? = 3000 (S) · What is the value of the 7 in 2,171? = 70 (R) · What is the value of the 6 in 654? = 600 (A) · What is the value of the 8 in 8,347? = 8000 (U) · What is the value of the 8 in 7,181? = 80 (I) · What is the value of the 7 in 17,449? = 7000 (D)
- Clue 2 (Rounding): "THE SNATCHER WRITES WITH THE LEFT HAND"Round 4,290 to the nearest hundred = 4300 (T) · Round 23 to the nearest ten = 20 (R) · Round 68 to the nearest ten = 70 (I) · Round 1,267 to the nearest hundred = 1300 (D) · Round 26 to the nearest ten = 30 (F) · Round 505 to the nearest hundred = 500 (N) · Round 234 to the nearest hundred = 200 (W) · Round 9,071 to the nearest thousand = 9000 (S) · Round 90 to the nearest ten = 90 (C) · Round 2,326 to the nearest hundred = 2300 (A) · Round 292 to the nearest ten = 290 (L) · Round 3,217 to the nearest thousand = 3000 (E) · Round 327 to the nearest hundred = 300 (H)
- Clue 3 (Addition): "USE A BRIGHT BEAM TO STOP THEM"2464 + 3025 = 5489 (U) · 3322 + 3240 = 6562 (G) · 2966 + 5737 = 8703 (H) · 1881 + 3508 = 5389 (I) · 1548 + 2140 = 3688 (T) · 1821 + 1195 = 3016 (M) · 1824 + 2998 = 4822 (P) · 4357 + 2422 = 6779 (O) · 1578 + 2382 = 3960 (E) · 3918 + 4945 = 8863 (A) · 4500 + 4375 = 8875 (S) · 4810 + 4926 = 9736 (R) · 2530 + 1635 = 4165 (B)
- Clue 4 (Subtraction): "BLACK STRANDS WERE LEFT ON THE MAP"1836 - 568 = 1268 (B) · 5209 - 3507 = 1702 (S) · 7424 - 3115 = 4309 (H) · 6235 - 2843 = 3392 (F) · 5805 - 1557 = 4248 (R) · 10691 - 2545 = 8146 (O) · 3398 - 1087 = 2311 (P) · 7307 - 4720 = 2587 (K) · 10941 - 3678 = 7263 (N) · 6175 - 3703 = 2472 (C) · 11750 - 3274 = 8476 (W) · 6666 - 3585 = 3081 (D) · 9061 - 4357 = 4704 (E) · 5827 - 1603 = 4224 (T) · 9170 - 384 = 8786 (M) · 10127 - 1704 = 8423 (A) · 6661 - 1349 = 5312 (L)
- Clue 5 (Division facts (1-12)): surviving statement (box 10) → Ben108 ÷ 12 = 9 · 64 ÷ 8 = 8 · 48 ÷ 8 = 6 · 21 ÷ 7 = 3 · 6 ÷ 6 = 1 · 66 ÷ 6 = 11 · 6 ÷ 3 = 2 · 120 ÷ 10 = 12 · 45 ÷ 9 = 5 · 12 ÷ 3 = 4 · 56 ÷ 8 = 7
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Place value, Rounding, Addition, Subtraction, Division
- Reading level
- grades 1-2
- Theme
- The Treehouse Map Mystery — set in Whispering Woods Island
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects