🐱 CatsGrade 1Reading: grades 1-2RoundingAdditionSubtractionSkip countingMissing addends
The Golden Fish Mystery
Oh no! The shiny Golden Fish Statue has been stolen from the Meow Town Museum. A sneaky cat burglar crept inside and snatched it. We must follow the fuzzy clues and find the 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 | Favorite Toy | Super Skill | Stripe Pattern | Fur Color | Distraction |
|---|---|---|---|---|---|
| Whiskers | Feather Wand | Super Sneaky | Straight Stripes | Black Fur | Scratching Post |
| Oliver | Feather Wand | Fast Runner | Swirly Stripes | Black Fur | Scratching Post |
| Leo | Feather Wand | Fast Runner | Straight Stripes | Black Fur | Opened Tuna Can |
| Rocky | Catnip Bubble Wand | High Jumper | Straight Stripes | Orange Fur | Warm Sunbeam |
| Toby | Squeaky Mouse | Super Sneaky | Swirly Stripes | Calico Fur | Scratching Post |
| Tom | Laser Pointer | High Jumper | Straight Stripes | Black Fur | Opened Tuna Can |
| Daisy | Laser Pointer | Night Vision | Swirly Stripes | Black Fur | Scratching Post |
| Milo | Squeaky Mouse | Super Sneaky | Straight Stripes | Orange Fur | Warm Sunbeam |
| Cleo | Catnip Bubble Wand | Night Vision | Swirly Stripes | Black Fur | Scratching Post |
| Chloe | Feather Wand | Super Sneaky | Swirly Stripes | Black Fur | Warm Sunbeam |
| Boots | Laser Pointer | Night Vision | Straight Stripes | Calico Fur | Opened Tuna Can |
| Simba | Catnip Bubble Wand | Loud Purrer | Swirly Stripes | Black Fur | Scratching Post |
| Lucy | Yarn Ball Launcher | Fast Runner | Swirly Stripes | Black Fur | Scratching Post |
| Luna | Squeaky Mouse | Loud Purrer | Straight Stripes | Orange Fur | Warm Sunbeam |
| Buster | Catnip Bubble Wand | Fast Runner | Straight Stripes | Black Fur | Scratching Post |
| Sylvester | Feather Wand | Super Sneaky | Swirly Stripes | Calico Fur | Scratching Post |
| Mittens | Yarn Ball Launcher | Night Vision | Straight Stripes | Black Fur | Opened Tuna Can |
| Socks | Squeaky Mouse | High Jumper | Straight Stripes | Orange Fur | Scratching Post |
| Garfield | Catnip Bubble Wand | High Jumper | Straight Stripes | Black Fur | Scratching Post |
| Lily | Feather Wand | Night Vision | Swirly Stripes | Calico Fur | Warm Sunbeam |
| Coco | Squeaky Mouse | Super Sneaky | Straight Stripes | Calico Fur | Opened Tuna Can |
Clue 1
Rounding
A scale at the door weighed the thief. It rounds the weight to the nearest ten. Let's look at the screen!
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
30
20
T
60
30
70
20
300
70
400
900
50
T
60
90
80
50
200
40
800
200
600
600
20
600
Round 57 to the nearest tenT
Round 42 to the nearest tenD
Round 52 to the nearest tenO
Round 943 to the nearest hundredN
Round 82 to the nearest tenL
Round 251 to the nearest hundredF
Round 217 to the nearest hundredU
Round 24 to the nearest tenE
Round 70 to the nearest tenI
Round 28 to the nearest tenH
Round 577 to the nearest hundredR
Round 426 to the nearest hundredS
Round 797 to the nearest hundredP
Round 91 to the nearest tenA
0/14 letters found
Clue 2
Addition
We found two bags of treats dropped on the floor. Let's add them up to see how many there are!
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
12
11
2
14
4
17
9
20
17
7
10
18
11
17
16
2
18
9
13
7
4
18
9 + 3 =T
4 + 3 =R
12 + 5 =A
14 + 6 =M
7 + 4 =H
13 + 5 =S
2 + 7 =W
11 + 5 =V
4 + 9 =I
10 + 4 =C
1 + 1 =E
7 + 3 =K
1 + 3 =L
0/13 letters found
Clue 3
Subtraction
The thief knocked over a jar of toy mice. Some rolled away. Let's subtract to find how many are 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.
W
19
12
5
17
6
4
8
9
3
16
7
15
3
2
10
7
16
11
9
17
4
15
2
12
W
19
17
17
8
20 - 1 =W
17 - 7 =M
15 - 4 =K
6 - 4 =H
10 - 3 =A
13 - 4 =S
9 - 5 =N
5 - 2 =C
18 - 1 =O
15 - 3 =E
17 - 2 =T
14 - 8 =U
10 - 2 =D
20 - 4 =R
9 - 4 =F
0/15 letters found
Clue 4
Skip counting
Paw prints lead down the hall in pairs. Let's skip count by twos to find where they go!
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
100
140
15
24
40
130
60
80
120
15
50
33
18
26
16
55
24
15
80
30
55
26
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120B
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, ___, 27, 30C
Skip-count by 10s. Fill the blank: 10, 20, ___, 40, 50P
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65E
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140W
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160L
Skip-count by 10s. Fill the blank: 10, 20, 30, ___, 50, 60K
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, ___, 65, 70U
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, ___, 60, 70S
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100R
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20H
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39O
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, ___, 18, 21A
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30T
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150F
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, ___, 21, 24N
0/16 letters found
Clue 5
Missing addends — the last clue
The curator's treat box is not full. We need to find how many treats are missing to solve this!
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
1 + ___ = 6
9 + ___ = 21
9 + ___ = 19
9 + ___ = 10
5 + ___ = 14
8 + ___ = 16
4 + ___ = 15
5 + ___ = 9
5 + ___ = 7
9 + ___ = 15
5 + ___ = 12
Step 2 — cross out the sentence with each answer
1.The villain shined a red laser light, then purred loudly to trick the birds.
2.The villain shined a red laser light, then leaped over the tall museum gates.
3.The villain waved a giant feather wand, then dashed down the dark alleyway.
4.The villain waved a giant feather wand, then crept past the sleeping dog guard.
5.The villain shot a huge ball of pink yarn, then dashed down the dark alleyway.
6.The villain blew sticky catnip bubbles, then purred loudly to trick the birds.
7.The villain waved a giant feather wand, then purred loudly to trick the birds.
8.The villain shot a huge ball of pink yarn, then purred loudly to trick the birds.
9.The villain shot a huge ball of pink yarn, then crept past the sleeping dog guard.
10.The villain shined a red laser light, then spotted the exit in the pitch black.
11.The villain tossed a noisy squeaky mouse, then crept past the sleeping dog guard.
12.The villain blew sticky catnip bubbles, then spotted the exit in the pitch black.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Golden Fish Mystery
Culprit: Oliver (Feather Wand · Fast Runner · Swirly Stripes · Black Fur · Scratching Post)
- Clue 1 (Rounding): "THE THIEF IS NOT A LOUD PURRER"Round 57 to the nearest ten = 60 (T) · Round 42 to the nearest ten = 40 (D) · Round 52 to the nearest ten = 50 (O) · Round 943 to the nearest hundred = 900 (N) · Round 82 to the nearest ten = 80 (L) · Round 251 to the nearest hundred = 300 (F) · Round 217 to the nearest hundred = 200 (U) · Round 24 to the nearest ten = 20 (E) · Round 70 to the nearest ten = 70 (I) · Round 28 to the nearest ten = 30 (H) · Round 577 to the nearest hundred = 600 (R) · Round 426 to the nearest hundred = 400 (S) · Round 797 to the nearest hundred = 800 (P) · Round 91 to the nearest ten = 90 (A)
- Clue 2 (Addition): "THE CLAW MARKS HAVE SWIRLS"9 + 3 = 12 (T) · 4 + 3 = 7 (R) · 12 + 5 = 17 (A) · 14 + 6 = 20 (M) · 7 + 4 = 11 (H) · 13 + 5 = 18 (S) · 2 + 7 = 9 (W) · 11 + 5 = 16 (V) · 4 + 9 = 13 (I) · 10 + 4 = 14 (C) · 1 + 1 = 2 (E) · 7 + 3 = 10 (K) · 1 + 3 = 4 (L)
- Clue 3 (Subtraction): "WE FOUND SCRATCH MARKS ON THE WOOD"20 - 1 = 19 (W) · 17 - 7 = 10 (M) · 15 - 4 = 11 (K) · 6 - 4 = 2 (H) · 10 - 3 = 7 (A) · 13 - 4 = 9 (S) · 9 - 5 = 4 (N) · 5 - 2 = 3 (C) · 18 - 1 = 17 (O) · 15 - 3 = 12 (E) · 17 - 2 = 15 (T) · 14 - 8 = 6 (U) · 10 - 2 = 8 (D) · 20 - 4 = 16 (R) · 9 - 4 = 5 (F)
- Clue 4 (Skip counting): "BLACK FUR WAS ON THE CARPET"Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120 = 100 (B) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, ___, 27, 30 = 24 (C) · Skip-count by 10s. Fill the blank: 10, 20, ___, 40, 50 = 30 (P) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65 = 55 (E) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140 = 120 (W) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160 = 140 (L) · Skip-count by 10s. Fill the blank: 10, 20, 30, ___, 50, 60 = 40 (K) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, ___, 65, 70 = 60 (U) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, ___, 60, 70 = 50 (S) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100 = 80 (R) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20 = 16 (H) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39 = 33 (O) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, ___, 18, 21 = 15 (A) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30 = 26 (T) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150 = 130 (F) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, ___, 21, 24 = 18 (N)
- Clue 5 (Missing addends): surviving statement (box 3) → Oliver1 + ___ = 6 = 5 · 9 + ___ = 21 = 12 · 9 + ___ = 19 = 10 · 9 + ___ = 10 = 1 · 5 + ___ = 14 = 9 · 8 + ___ = 16 = 8 · 4 + ___ = 15 = 11 · 5 + ___ = 9 = 4 · 5 + ___ = 7 = 2 · 9 + ___ = 15 = 6 · 5 + ___ = 12 = 7
About this mystery
- Grade level
- Grade 1 math
- Math topics
- Rounding, Addition, Subtraction, Skip counting, Missing addends
- Reading level
- grades 1-2
- Theme
- The Golden Fish Mystery — set in Meow Town Museum
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects