Grade 3Reading: grades 3-4AdditionSubtractionPlace valueRoundingDivision
The Whispering Woods Mystery
Someone snuck into the Treehouse Club and took the Golden Compass! We need to find the map snatcher before they reach the hidden cove.
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 | Signature Gear | Specialist Skill | Map Marking Hand | Bandana Color | Silly Fear |
|---|---|---|---|---|---|
| Ava | Walkie Talkie | expert climbing | RIGHT HANDED | RED BANDANA | BUBBLE BLOWER |
| Noah | Decoder Ring | rope swinging | LEFT HANDED | BLUE BANDANA | SHINY FOIL |
| Luke | Climbing Rope | fast paddling | LEFT HANDED | BLUE BANDANA | BUBBLE BLOWER |
| Owen | Walkie Talkie | code cracking | RIGHT HANDED | GREEN BANDANA | SHINY FOIL |
| Ella | Bright Flashlight | code cracking | LEFT HANDED | BLUE BANDANA | BUBBLE BLOWER |
| Max | Pocket Spyglass | expert climbing | LEFT HANDED | GREEN BANDANA | BUBBLE BLOWER |
| Grace | Climbing Rope | expert climbing | RIGHT HANDED | BLUE BANDANA | BUBBLE BLOWER |
| Maya | Pocket Spyglass | map drawing | LEFT HANDED | BLUE BANDANA | BUBBLE BLOWER |
| Lily | Bright Flashlight | rope swinging | LEFT HANDED | RED BANDANA | SQUEAKY SHOES |
| Harper | Walkie Talkie | map drawing | LEFT HANDED | BLUE BANDANA | BUBBLE BLOWER |
| Zoe | Pocket Spyglass | code cracking | LEFT HANDED | GREEN BANDANA | SQUEAKY SHOES |
| Chloe | Pocket Spyglass | map drawing | LEFT HANDED | BLUE BANDANA | SQUEAKY SHOES |
| Finn | Walkie Talkie | code cracking | LEFT HANDED | BLUE BANDANA | SHINY FOIL |
| Ruby | Climbing Rope | rope swinging | LEFT HANDED | RED BANDANA | SHINY FOIL |
| Sophia | Walkie Talkie | map drawing | LEFT HANDED | GREEN BANDANA | SQUEAKY SHOES |
| Eli | Climbing Rope | rope swinging | LEFT HANDED | BLUE BANDANA | BUBBLE BLOWER |
| Jack | Climbing Rope | fast paddling | RIGHT HANDED | BLUE BANDANA | SQUEAKY SHOES |
| Sam | Pocket Spyglass | code cracking | LEFT HANDED | BLUE BANDANA | BUBBLE BLOWER |
| Ivy | Bright Flashlight | map drawing | RIGHT HANDED | GREEN BANDANA | SQUEAKY SHOES |
| Wyatt | Bright Flashlight | code cracking | LEFT HANDED | RED BANDANA | BUBBLE BLOWER |
| Toby | Bright Flashlight | code cracking | LEFT HANDED | GREEN BANDANA | SQUEAKY SHOES |
Clue 1
Addition
We found foot tracks leading away from the giant oak tree. Let us add up all the boot prints we see to track 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
235
549
670
356
743
670
445
935
222
285
699
536
536
445
699
743
505
445
743
743
720
T
235
509
557
445
386
753
445
264
356
91 + 144 =T
158 + 347 =C
578 + 357 =K
378 + 179 =R
484 + 215 =I
130 + 226 =S
343 + 206 =H
330 + 423 =M
252 + 193 =A
240 + 430 =E
456 + 264 =O
105 + 117 =Y
125 + 160 =V
157 + 352 =D
329 + 207 =L
206 + 180 =W
458 + 285 =N
151 + 113 =P
0/18 letters found
Clue 2
Subtraction
The thief dropped a pack of juice boxes. If we subtract the empty boxes from the total, we can tell how long they rested.
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
115
208
821
838
696
232
232
621
696
668
815
400
821
310
T
115
208
821
696
888
232
821
374
T
115
208
621
668
310
T
115
436
323
888
696
T
115
821
496 - 381 =T
1078 - 190 =R
414 - 206 =H
447 - 137 =D
370 - 138 =L
770 - 370 =S
1113 - 298 =U
767 - 146 =A
890 - 69 =E
1232 - 394 =V
658 - 222 =O
892 - 196 =I
492 - 169 =W
742 - 74 =N
710 - 336 =F
0/15 letters found
Clue 3
Place value
A coded notebook has three digits written on the cover. We must look at the tens place to unlock the latch.
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
9000
50
200
80
70
3000
3000
40
70
90
400
50
20
40
90
900
800
20
700
6000
40
4000
2000
4000
4000
3000
200
4000
3000
700
1000
200
20
What is the value of the 9 in 69,036?T
What is the value of the 1 in 31,090?W
What is the value of the 2 in 2,307?U
What is the value of the 7 in 575?I
What is the value of the 9 in 393?N
What is the value of the 8 in 805?F
What is the value of the 2 in 9,625?R
What is the value of the 4 in 4,325?B
What is the value of the 3 in 13,244?L
What is the value of the 4 in 2,647?A
What is the value of the 8 in 9,583?V
What is the value of the 9 in 2,923?K
What is the value of the 5 in 8,251?H
What is the value of the 7 in 741?O
What is the value of the 2 in 218?E
What is the value of the 4 in 401?S
What is the value of the 6 in 36,880?M
0/17 letters found
Clue 4
Rounding
Our trusty radar screen shows the bandit is close. We need to round the distance to the nearest ten to pinpoint them.
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
80
9000
7000
30
20
200
800
50
2000
400
20
9000
2000
50
200
800
50
200
50
50
4000
4000
60
9000
40
700
9000
200
9000
Round 77 to the nearest tenW
Round 403 to the nearest hundredL
Round 844 to the nearest hundredD
Round 1,777 to the nearest thousandB
Round 34 to the nearest tenO
Round 209 to the nearest hundredN
Round 40 to the nearest tenS
Round 61 to the nearest tenH
Round 22 to the nearest tenU
Round 46 to the nearest tenA
Round 695 to the nearest hundredC
Round 7,101 to the nearest thousandF
Round 8,791 to the nearest thousandE
Round 4,392 to the nearest thousandT
0/14 letters found
Clue 5
Division facts (1-12) — the last clue
We found a pile of gold coins left behind. If we divide them equally among our team, we will find the final secret.
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
80 ÷ 10 = ?
7 ÷ 7 = ?
45 ÷ 5 = ?
11 ÷ 1 = ?
60 ÷ 10 = ?
25 ÷ 5 = ?
30 ÷ 10 = ?
132 ÷ 11 = ?
20 ÷ 10 = ?
24 ÷ 6 = ?
20 ÷ 2 = ?
Step 2 — cross out the sentence with each answer
1.The villain scaled the tree with climbing rope, then escaped with fast paddling.
2.The villain signaled with a bright flashlight, then swung away using rope swinging.
3.The villain signaled with a bright flashlight, then escaped with fast paddling.
4.The villain chattered on a walkie talkie, then scrawled directions with map drawing.
5.The villain signaled with a bright flashlight, then scrawled directions with map drawing.
6.The villain signaled with a bright flashlight, then fled using expert climbing.
7.The villain scaled the tree with climbing rope, then swung away using rope swinging.
8.The villain spied with a pocket spyglass, then bypassed the locks with code cracking.
9.The villain signaled with a bright flashlight, then bypassed the locks with code cracking.
10.The villain chattered on a walkie talkie, then swung away using rope swinging.
11.The villain scaled the tree with climbing rope, then fled using expert climbing.
12.The villain chattered on a walkie talkie, then escaped with fast paddling.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Whispering Woods Mystery
Culprit: Eli (Climbing Rope · rope swinging · LEFT HANDED · BLUE BANDANA · BUBBLE BLOWER)
- Clue 1 (Addition): "THE SNEAKY VILLAIN CANNOT DRAW MAPS"91 + 144 = 235 (T) · 158 + 347 = 505 (C) · 578 + 357 = 935 (K) · 378 + 179 = 557 (R) · 484 + 215 = 699 (I) · 130 + 226 = 356 (S) · 343 + 206 = 549 (H) · 330 + 423 = 753 (M) · 252 + 193 = 445 (A) · 240 + 430 = 670 (E) · 456 + 264 = 720 (O) · 105 + 117 = 222 (Y) · 125 + 160 = 285 (V) · 157 + 352 = 509 (D) · 329 + 207 = 536 (L) · 206 + 180 = 386 (W) · 458 + 285 = 743 (N) · 151 + 113 = 264 (P)
- Clue 2 (Subtraction): "THE VILLAIN USED THEIR LEFT HAND TO WRITE"496 - 381 = 115 (T) · 1078 - 190 = 888 (R) · 414 - 206 = 208 (H) · 447 - 137 = 310 (D) · 370 - 138 = 232 (L) · 770 - 370 = 400 (S) · 1113 - 298 = 815 (U) · 767 - 146 = 621 (A) · 890 - 69 = 821 (E) · 1232 - 394 = 838 (V) · 658 - 222 = 436 (O) · 892 - 196 = 696 (I) · 492 - 169 = 323 (W) · 742 - 74 = 668 (N) · 710 - 336 = 374 (F)
- Clue 3 (Place value): "THE VILLAIN SHRANK FROM A BUBBLE BLOWER"What is the value of the 9 in 69,036? = 9000 (T) · What is the value of the 1 in 31,090? = 1000 (W) · What is the value of the 2 in 2,307? = 2000 (U) · What is the value of the 7 in 575? = 70 (I) · What is the value of the 9 in 393? = 90 (N) · What is the value of the 8 in 805? = 800 (F) · What is the value of the 2 in 9,625? = 20 (R) · What is the value of the 4 in 4,325? = 4000 (B) · What is the value of the 3 in 13,244? = 3000 (L) · What is the value of the 4 in 2,647? = 40 (A) · What is the value of the 8 in 9,583? = 80 (V) · What is the value of the 9 in 2,923? = 900 (K) · What is the value of the 5 in 8,251? = 50 (H) · What is the value of the 7 in 741? = 700 (O) · What is the value of the 2 in 218? = 200 (E) · What is the value of the 4 in 401? = 400 (S) · What is the value of the 6 in 36,880? = 6000 (M)
- Clue 4 (Rounding): "WE FOUND A BLUE BANDANA AT THE SCENE"Round 77 to the nearest ten = 80 (W) · Round 403 to the nearest hundred = 400 (L) · Round 844 to the nearest hundred = 800 (D) · Round 1,777 to the nearest thousand = 2000 (B) · Round 34 to the nearest ten = 30 (O) · Round 209 to the nearest hundred = 200 (N) · Round 40 to the nearest ten = 40 (S) · Round 61 to the nearest ten = 60 (H) · Round 22 to the nearest ten = 20 (U) · Round 46 to the nearest ten = 50 (A) · Round 695 to the nearest hundred = 700 (C) · Round 7,101 to the nearest thousand = 7000 (F) · Round 8,791 to the nearest thousand = 9000 (E) · Round 4,392 to the nearest thousand = 4000 (T)
- Clue 5 (Division facts (1-12)): surviving statement (box 7) → Eli80 ÷ 10 = 8 · 7 ÷ 7 = 1 · 45 ÷ 5 = 9 · 11 ÷ 1 = 11 · 60 ÷ 10 = 6 · 25 ÷ 5 = 5 · 30 ÷ 10 = 3 · 132 ÷ 11 = 12 · 20 ÷ 10 = 2 · 24 ÷ 6 = 4 · 20 ÷ 2 = 10
About this mystery
- Grade level
- Grade 3 math
- Math topics
- Addition, Subtraction, Place value, Rounding, Division
- Reading level
- grades 3-4
- Theme
- The Whispering Woods Mystery — set in The Whispering Woods Secret Island
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects