Grade 4Reading: grades 1-2Place valueAdditionSubtractionRoundingDivision
The Mystery of the Missing Map
Someone snuck into the Sunken Cove Treehouse and took the golden compass! Follow the clues to find out who did it.
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 | Gear | Gadget | Stance | Hat Color | Fear |
|---|---|---|---|---|---|
| Hugo Hill | Rope Launcher | Decoder Ring | Right Handed | Red Cap | Cold Water |
| Jax Jet | Rope Launcher | Flashlight | Right Handed | Blue Cap | Cold Water |
| Luna Leaf | Pocket Torch | Whistle | Right Handed | Blue Cap | Bright Light |
| Eli Echo | Spyglass | Compass | Left Handed | Red Cap | Loud Sounds |
| Finn Fern | Pocket Torch | Smoke Bomb | Left Handed | Green Cap | Loud Sounds |
| Maya Map | Grappling Hook | Smoke Bomb | Right Handed | Red Cap | Bright Light |
| Cole Cave | Pocket Torch | Smoke Bomb | Right Handed | Blue Cap | Bright Light |
| Wren Wood | Grappling Hook | Smoke Bomb | Right Handed | Green Cap | Bright Light |
| Pip Parker | Grappling Hook | Decoder Ring | Right Handed | Blue Cap | Bright Light |
| Kira Kite | Glider Wings | Flashlight | Right Handed | Blue Cap | Cold Water |
| Gage Glen | Glider Wings | Smoke Bomb | Right Handed | Green Cap | Bright Light |
| Ivy Island | Pocket Torch | Compass | Right Handed | Blue Cap | Loud Sounds |
| Ella Edge | Pocket Torch | Compass | Left Handed | Red Cap | Cold Water |
| Milo Mist | Spyglass | Whistle | Left Handed | Green Cap | Bright Light |
| Suri Sky | Grappling Hook | Smoke Bomb | Left Handed | Blue Cap | Loud Sounds |
| Ruby River | Grappling Hook | Decoder Ring | Left Handed | Blue Cap | Bright Light |
| Tess Tide | Glider Wings | Whistle | Right Handed | Green Cap | Cold Water |
| Leo Log | Glider Wings | Compass | Right Handed | Blue Cap | Bright Light |
| Zoe Zip | Pocket Torch | Decoder Ring | Left Handed | Green Cap | Cold Water |
| Toby Trail | Glider Wings | Smoke Bomb | Right Handed | Blue Cap | Bright Light |
| Nora Net | Glider Wings | Whistle | Right Handed | Blue Cap | Loud Sounds |
Clue 1
Place value
You check the lock code digit by digit to see what gear was dropped.
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
7000
700
800
900
5000
800
90
200
80
70
90
5000
40
500
T
7000
40
300
800
900
5000
300
T
7000
1000
900
800
90
3000
700
500
900
T
7000
9000
800
What is the value of the 7 in 47,066?T
What is the value of the 9 in 793?A
What is the value of the 8 in 6,870?E
What is the value of the 7 in 4,678?B
What is the value of the 3 in 1,309?O
What is the value of the 3 in 73,678?W
What is the value of the 7 in 3,763?H
What is the value of the 1 in 1,886?U
What is the value of the 9 in 970?S
What is the value of the 2 in 8,263?K
What is the value of the 5 in 95,928?N
What is the value of the 9 in 79,570?L
What is the value of the 8 in 985?Y
What is the value of the 4 in 9,949?D
What is the value of the 5 in 596?I
0/15 letters found
Clue 2
Addition
You add up all the lost trail snacks to trace the thief.
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
7409
4206
9535
7789
8303
3456
2417
5213
T
7409
7300
9535
8303
8773
4206
9535
2417
4766
5213
T
7409
4206
T
7409
4206
9535
5213
7300
7300
5213
6852
4206
T
7409
4206
8303
3456
2417
4594 + 2815 =T
3771 + 5002 =C
4085 + 4218 =A
5299 + 2490 =B
1216 + 2240 =N
1446 + 3320 =W
4803 + 2497 =R
2132 + 2074 =H
980 + 1437 =D
6588 + 2947 =E
2418 + 2795 =I
2959 + 3893 =G
0/12 letters found
Clue 3
Subtraction
You subtract the footprints on the path 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
7947
7722
7935
6005
3290
7795
6085
8587
T
7947
6100
3290
7795
3290
5672
3290
7811
4838
6100
3433
8793
T
7947
7722
7935
6005
6100
8587
6023
7722
T
7947
6005
7935
3290
8793
12263 - 4316 =T
6382 - 359 =G
5104 - 266 =F
12514 - 4719 =N
7751 - 4461 =A
8999 - 3327 =W
9480 - 3380 =R
11961 - 4150 =Y
12197 - 4475 =H
3586 - 153 =O
9128 - 3123 =B
9418 - 3333 =D
13115 - 4528 =I
9755 - 962 =M
11153 - 3218 =E
0/15 letters found
Clue 4
Rounding
The treehouse radar only gives rounded numbers for speed.
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
20
9000
A
20
2000
30
1300
290
90
200
300
3000
2000
200
A
20
9000
3700
A
20
2900
1100
70
90
50
9000
50
200
A
20
2000
300
3000
200
300
2000
200
200
Round 19 to the nearest tenA
Round 27 to the nearest tenK
Round 52 to the nearest tenN
Round 2,756 to the nearest thousandH
Round 289 to the nearest tenL
Round 1,329 to the nearest hundredB
Round 2,909 to the nearest hundredS
Round 1,848 to the nearest thousandR
Round 90 to the nearest tenU
Round 3,712 to the nearest hundredW
Round 296 to the nearest hundredT
Round 1,070 to the nearest hundredF
Round 66 to the nearest tenO
Round 199 to the nearest hundredE
Round 9,307 to the nearest thousandD
0/15 letters found
Clue 5
Division facts (1-12) — the last clue
You divide the shiny gold coins equally among four clue bags.
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 ÷ 7 = ?
77 ÷ 7 = ?
32 ÷ 4 = ?
20 ÷ 2 = ?
30 ÷ 5 = ?
27 ÷ 9 = ?
21 ÷ 3 = ?
96 ÷ 8 = ?
22 ÷ 11 = ?
54 ÷ 6 = ?
28 ÷ 7 = ?
Step 2 — cross out the sentence with each answer
1.The villain swings fast with a grappling hook, then spins a secret decoder ring.
2.The villain swings fast with a grappling hook, then clicks a bright flashlight on.
3.The villain scouts ahead using a spyglass, then signals with a noisy whistle.
4.The villain scouts ahead using a spyglass, then spins a secret decoder ring.
5.The villain soars down with glider wings, then vanishes behind a smoke bomb.
6.The villain scouts ahead using a spyglass, then clicks a bright flashlight on.
7.The villain swings fast with a grappling hook, then signals with a noisy whistle.
8.The villain soars down with glider wings, then checks the shiny compass face.
9.The villain flashes a small pocket torch, then spins a secret decoder ring.
10.The villain scouts ahead using a spyglass, then vanishes behind a smoke bomb.
11.The villain flashes a small pocket torch, then vanishes behind a smoke bomb.
12.The villain swings fast with a grappling hook, then checks the shiny compass face.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mystery of the Missing Map
Culprit: Toby Trail (Glider Wings · Smoke Bomb · Right Handed · Blue Cap · Bright Light)
- Clue 1 (Place value): "THE SNEAKY BANDIT DOES NOT USE A WHISTLE"What is the value of the 7 in 47,066? = 7000 (T) · What is the value of the 9 in 793? = 90 (A) · What is the value of the 8 in 6,870? = 800 (E) · What is the value of the 7 in 4,678? = 70 (B) · What is the value of the 3 in 1,309? = 300 (O) · What is the value of the 3 in 73,678? = 3000 (W) · What is the value of the 7 in 3,763? = 700 (H) · What is the value of the 1 in 1,886? = 1000 (U) · What is the value of the 9 in 970? = 900 (S) · What is the value of the 2 in 8,263? = 200 (K) · What is the value of the 5 in 95,928? = 5000 (N) · What is the value of the 9 in 79,570? = 9000 (L) · What is the value of the 8 in 985? = 80 (Y) · What is the value of the 4 in 9,949? = 40 (D) · What is the value of the 5 in 596? = 500 (I)
- Clue 2 (Addition): "THE BANDIT REACHED WITH THEIR RIGHT HAND"4594 + 2815 = 7409 (T) · 3771 + 5002 = 8773 (C) · 4085 + 4218 = 8303 (A) · 5299 + 2490 = 7789 (B) · 1216 + 2240 = 3456 (N) · 1446 + 3320 = 4766 (W) · 4803 + 2497 = 7300 (R) · 2132 + 2074 = 4206 (H) · 980 + 1437 = 2417 (D) · 6588 + 2947 = 9535 (E) · 2418 + 2795 = 5213 (I) · 2959 + 3893 = 6852 (G)
- Clue 3 (Subtraction): "THE BANDIT RAN AWAY FROM THE BRIGHT BEAM"12263 - 4316 = 7947 (T) · 6382 - 359 = 6023 (G) · 5104 - 266 = 4838 (F) · 12514 - 4719 = 7795 (N) · 7751 - 4461 = 3290 (A) · 8999 - 3327 = 5672 (W) · 9480 - 3380 = 6100 (R) · 11961 - 4150 = 7811 (Y) · 12197 - 4475 = 7722 (H) · 3586 - 153 = 3433 (O) · 9128 - 3123 = 6005 (B) · 9418 - 3333 = 6085 (D) · 13115 - 4528 = 8587 (I) · 9755 - 962 = 8793 (M) · 11153 - 3218 = 7935 (E)
- Clue 4 (Rounding): "A DARK BLUE THREAD WAS FOUND NEAR THE TREE"Round 19 to the nearest ten = 20 (A) · Round 27 to the nearest ten = 30 (K) · Round 52 to the nearest ten = 50 (N) · Round 2,756 to the nearest thousand = 3000 (H) · Round 289 to the nearest ten = 290 (L) · Round 1,329 to the nearest hundred = 1300 (B) · Round 2,909 to the nearest hundred = 2900 (S) · Round 1,848 to the nearest thousand = 2000 (R) · Round 90 to the nearest ten = 90 (U) · Round 3,712 to the nearest hundred = 3700 (W) · Round 296 to the nearest hundred = 300 (T) · Round 1,070 to the nearest hundred = 1100 (F) · Round 66 to the nearest ten = 70 (O) · Round 199 to the nearest hundred = 200 (E) · Round 9,307 to the nearest thousand = 9000 (D)
- Clue 5 (Division facts (1-12)): surviving statement (box 5) → Toby Trail7 ÷ 7 = 1 · 77 ÷ 7 = 11 · 32 ÷ 4 = 8 · 20 ÷ 2 = 10 · 30 ÷ 5 = 6 · 27 ÷ 9 = 3 · 21 ÷ 3 = 7 · 96 ÷ 8 = 12 · 22 ÷ 11 = 2 · 54 ÷ 6 = 9 · 28 ÷ 7 = 4
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Place value, Addition, Subtraction, Rounding, Division
- Reading level
- grades 1-2
- Theme
- The Mystery of the Missing Map — set in Sunken Cove Treehouse
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects