🐶 Beach and dogsGrade 3Reading: grades 3-4RoundingAdditionSubtractionMultiplicationMissing addends
The Great Beach Bone Heist
The golden trophy bone has vanished from the sandcastle stage! Head Lifeguard Barney needs you to search Sandy Paws Cove and sniff out the pup who took it before the sunset campfire.
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 | Primary Trick | Beach Gear | Bark Style | Fur Coat | Best Distraction |
|---|---|---|---|---|---|
| Sunny | splashes water | fancy leash | yips quickly | golden fur | belly rubs |
| Duke | shakes sand | sun visor | yips quickly | golden fur | tennis balls |
| Lola | digging holes | shiny goggles | howls loudly | curly black fur | tennis balls |
| Barnaby | catching frisbees | fancy leash | howls loudly | golden fur | tennis balls |
| Otis | shakes sand | fancy leash | yips quickly | golden fur | tennis balls |
| Peanut | shakes sand | fancy leash | yips quickly | curly black fur | smelly treats |
| Marley | shakes sand | shiny goggles | yips quickly | curly black fur | tennis balls |
| Tucker | catching frisbees | shiny goggles | yips quickly | curly black fur | tennis balls |
| Pippa | shakes sand | red life vest | yips quickly | golden fur | tennis balls |
| Winston | catching frisbees | squeaky ball | yips quickly | golden fur | tennis balls |
| Coco | riding surfboards | squeaky ball | howls loudly | golden fur | tennis balls |
| Sadie | splashes water | sun visor | yips quickly | golden fur | belly rubs |
| Cooper | shakes sand | fancy leash | yips quickly | golden fur | belly rubs |
| Bella | shakes sand | red life vest | yips quickly | spotted white fur | tennis balls |
| Ziggy | riding surfboards | sun visor | howls loudly | spotted white fur | smelly treats |
| Barkley | shakes sand | sun visor | yips quickly | spotted white fur | smelly treats |
| Buddy | catching frisbees | squeaky ball | yips quickly | golden fur | smelly treats |
| Sandy | shakes sand | red life vest | howls loudly | golden fur | smelly treats |
| Buster | riding surfboards | shiny goggles | yips quickly | golden fur | belly rubs |
| Wave | catching frisbees | sun visor | yips quickly | golden fur | tennis balls |
| Daisy | digging holes | sun visor | yips quickly | curly black fur | tennis balls |
Clue 1
Rounding
A radar camera on the boardwalk took a blurry photo, but it only shows speeds rounded to the nearest ten. Round these numbers 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
60
400
700
T
60
400
600
700
5000
40
900
700
30
3000
900
T
60
400
20
80
700
20
30
9000
200
700
20
2000
500
8000
20
4000
4000
Round 61 to the nearest tenT
Round 2,597 to the nearest thousandN
Round 8,584 to the nearest thousandQ
Round 216 to the nearest hundredU
Round 17 to the nearest tenA
Round 731 to the nearest hundredE
Round 589 to the nearest hundredI
Round 403 to the nearest hundredH
Round 885 to the nearest hundredO
Round 3,691 to the nearest thousandL
Round 544 to the nearest hundredY
Round 40 to the nearest tenD
Round 4,909 to the nearest thousandF
Round 78 to the nearest tenV
Round 33 to the nearest tenS
Round 7,978 to the nearest thousandB
Round 2,132 to the nearest thousandK
0/17 letters found
Clue 2
Addition
We need to count all the plastic beach whistles scattered on the beach. Add up the piles to see what gear the culprit was wearing.
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
243
769
256
626
950
626
883
256
328
T
243
954
544
883
626
655
256
589
954
845
950
544
328
619
237
954
137 + 106 =T
579 + 304 =P
453 + 202 =V
359 + 591 =U
244 + 345 =R
329 + 440 =H
498 + 456 =Y
117 + 120 =L
301 + 325 =S
174 + 370 =I
105 + 151 =E
212 + 407 =K
511 + 334 =Q
119 + 209 =C
0/14 letters found
Clue 3
Subtraction
Some pup took a big bite out of the fish biscuits at the snack shack. Subtract the missing snacks to reveal the thief's weakness.
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
877
767
845
149
149
683
567
203
A
877
746
746
809
683
746
746
567
767
245
827
767
837
845
181
1086 - 209 =A
846 - 19 =P
1074 - 328 =L
1058 - 249 =W
192 - 43 =N
659 - 92 =S
1101 - 334 =T
586 - 383 =B
493 - 248 =O
312 - 131 =M
994 - 149 =E
800 - 117 =I
838 - 1 =H
0/13 letters found
Clue 4
Multiplication facts (1-12)
The culprit ran past rows of beach umbrellas and knocked some over. Multiply the rows to find a clue about their fur color.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
I
40
120
99
45
72
80
50
99
90
80
33
72
120
45
84
99
72
21
96
33
121
108
21
8 × 5 =I
5 × 10 =G
8 × 12 =H
12 × 9 =A
9 × 10 =L
3 × 7 =T
8 × 9 =N
10 × 12 =F
11 × 9 =O
11 × 11 =M
7 × 12 =R
11 × 3 =E
10 × 8 =D
5 × 9 =U
0/14 letters found
Clue 5
Missing addends — the last clue
We need twenty life vests for the swim team, but some are missing. Find the missing number to discover how the pup barks.
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
8 + ___ = 20
4 + ___ = 5
5 + ___ = 8
3 + ___ = 5
6 + ___ = 12
9 + ___ = 13
5 + ___ = 13
9 + ___ = 19
10 + ___ = 21
6 + ___ = 13
5 + ___ = 10
Step 2 — cross out the sentence with each answer
1.The villain shakes wet sand everywhere, then tips their sun visor.
2.The villain catches a flying frisbee, then tangles up their fancy leash.
3.The villain shakes wet sand everywhere, then tangles up their fancy leash.
4.The villain digs a deep hole in the sand, then tangles up their fancy leash.
5.The villain catches a flying frisbee, then adjusts their shiny goggles.
6.The villain splashes water at the crowd, then adjusts their shiny goggles.
7.The villain splashes water at the crowd, then squeaks a rubber ball.
8.The villain rides a giant wave on a surfboard, then tangles up their fancy leash.
9.The villain catches a flying frisbee, then tips their sun visor.
10.The villain rides a giant wave on a surfboard, then squeaks a rubber ball.
11.The villain rides a giant wave on a surfboard, then tips their sun visor.
12.The villain shakes wet sand everywhere, then buckles their red life vest.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Great Beach Bone Heist
Culprit: Wave (catching frisbees · sun visor · yips quickly · golden fur · tennis balls)
- Clue 1 (Rounding): "THE THIEF DOES NOT HAVE A SQUEAKY BALL"Round 61 to the nearest ten = 60 (T) · Round 2,597 to the nearest thousand = 3000 (N) · Round 8,584 to the nearest thousand = 9000 (Q) · Round 216 to the nearest hundred = 200 (U) · Round 17 to the nearest ten = 20 (A) · Round 731 to the nearest hundred = 700 (E) · Round 589 to the nearest hundred = 600 (I) · Round 403 to the nearest hundred = 400 (H) · Round 885 to the nearest hundred = 900 (O) · Round 3,691 to the nearest thousand = 4000 (L) · Round 544 to the nearest hundred = 500 (Y) · Round 40 to the nearest ten = 40 (D) · Round 4,909 to the nearest thousand = 5000 (F) · Round 78 to the nearest ten = 80 (V) · Round 33 to the nearest ten = 30 (S) · Round 7,978 to the nearest thousand = 8000 (B) · Round 2,132 to the nearest thousand = 2000 (K)
- Clue 2 (Addition): "THE SUSPECT YIPS VERY QUICKLY"137 + 106 = 243 (T) · 579 + 304 = 883 (P) · 453 + 202 = 655 (V) · 359 + 591 = 950 (U) · 244 + 345 = 589 (R) · 329 + 440 = 769 (H) · 498 + 456 = 954 (Y) · 117 + 120 = 237 (L) · 301 + 325 = 626 (S) · 174 + 370 = 544 (I) · 105 + 151 = 256 (E) · 212 + 407 = 619 (K) · 511 + 334 = 845 (Q) · 119 + 209 = 328 (C)
- Clue 3 (Subtraction): "A TENNIS BALL WILL STOP THEM"1086 - 209 = 877 (A) · 846 - 19 = 827 (P) · 1074 - 328 = 746 (L) · 1058 - 249 = 809 (W) · 192 - 43 = 149 (N) · 659 - 92 = 567 (S) · 1101 - 334 = 767 (T) · 586 - 383 = 203 (B) · 493 - 248 = 245 (O) · 312 - 131 = 181 (M) · 994 - 149 = 845 (E) · 800 - 117 = 683 (I) · 838 - 1 = 837 (H)
- Clue 4 (Multiplication facts (1-12)): "I FOUND GOLDEN FUR ON THE MAT"8 × 5 = 40 (I) · 5 × 10 = 50 (G) · 8 × 12 = 96 (H) · 12 × 9 = 108 (A) · 9 × 10 = 90 (L) · 3 × 7 = 21 (T) · 8 × 9 = 72 (N) · 10 × 12 = 120 (F) · 11 × 9 = 99 (O) · 11 × 11 = 121 (M) · 7 × 12 = 84 (R) · 11 × 3 = 33 (E) · 10 × 8 = 80 (D) · 5 × 9 = 45 (U)
- Clue 5 (Missing addends): surviving statement (box 9) → Wave8 + ___ = 20 = 12 · 4 + ___ = 5 = 1 · 5 + ___ = 8 = 3 · 3 + ___ = 5 = 2 · 6 + ___ = 12 = 6 · 9 + ___ = 13 = 4 · 5 + ___ = 13 = 8 · 9 + ___ = 19 = 10 · 10 + ___ = 21 = 11 · 6 + ___ = 13 = 7 · 5 + ___ = 10 = 5
About this mystery
- Grade level
- Grade 3 math
- Math topics
- Rounding, Addition, Subtraction, Multiplication, Missing addends
- Reading level
- grades 3-4
- Theme
- The Great Beach Bone Heist — set in Sandy Paws Cove
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects