🚀 Pirates, Robots, Dinosaurs, Grade 4Reading: grades 3-4RoundingWord problemsAdditionSubtractionDivision
The Cosmic Robo-Dino Heist
A rogue robo-captain has raided the starship of Chief Astro-Engineer Barnaby! They swiped the Golden Plasma Gear and escaped into the dark asteroid field. We must study the cosmic clues left behind to catch the correct metal dino-pirate!
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 | Dino-Frame Class | Cosmic Tool | Sensor Blink | Cable Wig | System Vulnerability |
|---|---|---|---|---|---|
| Screaming Stego | T-Rex Chassis | Solar Cutlass | Right eye sensor blinks | Shiny copper wires | Giant magnets |
| Pegleg Rex | Stegosaurus Spikes | Laser Hook | Left eye sensor blinks | Shiny copper wires | Water splashes |
| Cyber Caesar | Triceratops Armor | Cyber Eye Patch | Right eye sensor blinks | Shiny copper wires | Bright solar flashes |
| Tricera Tech | Stegosaurus Spikes | Gravity Anchor | Left eye sensor blinks | Shiny copper wires | Bright solar flashes |
| Byte Sized Bones | Pterodactyl Wings | Plasma Cannon | Right eye sensor blinks | Neon-blue oil hoses | Water splashes |
| Metal Horns | Stegosaurus Spikes | Plasma Cannon | Left eye sensor blinks | Shiny copper wires | Bright solar flashes |
| Starboard Spike | Triceratops Armor | Solar Cutlass | Left eye sensor blinks | Shiny copper wires | Water splashes |
| Captain CyberJaw | T-Rex Chassis | Solar Cutlass | Right eye sensor blinks | Neon-blue oil hoses | Bright solar flashes |
| Raptor Rust | Raptor Frame | Plasma Cannon | Right eye sensor blinks | Shiny copper wires | Bright solar flashes |
| Robo Redbeard | Raptor Frame | Solar Cutlass | Left eye sensor blinks | Neon-blue oil hoses | Bright solar flashes |
| Silver Talon | Pterodactyl Wings | Plasma Cannon | Left eye sensor blinks | Neon-blue oil hoses | Bright solar flashes |
| Gear Grinder | Triceratops Armor | Plasma Cannon | Right eye sensor blinks | Rust-red power cables | Giant magnets |
| Space Saurian | T-Rex Chassis | Laser Hook | Left eye sensor blinks | Rust-red power cables | Water splashes |
| Iron Wing | Stegosaurus Spikes | Laser Hook | Right eye sensor blinks | Shiny copper wires | Water splashes |
| Laser Tooth | Raptor Frame | Laser Hook | Left eye sensor blinks | Shiny copper wires | Bright solar flashes |
| Mecha Meg | Stegosaurus Spikes | Solar Cutlass | Left eye sensor blinks | Rust-red power cables | Water splashes |
| Plank Walker | Stegosaurus Spikes | Cyber Eye Patch | Left eye sensor blinks | Shiny copper wires | Bright solar flashes |
| Salty Sprocket | Raptor Frame | Solar Cutlass | Right eye sensor blinks | Neon-blue oil hoses | Water splashes |
| Rusty Raptor | Pterodactyl Wings | Laser Hook | Right eye sensor blinks | Rust-red power cables | Water splashes |
| Volt Raptor | Triceratops Armor | Plasma Cannon | Left eye sensor blinks | Shiny copper wires | Bright solar flashes |
| Bolts the Kid | Triceratops Armor | Plasma Cannon | Left eye sensor blinks | Rust-red power cables | Water splashes |
Clue 1
Rounding
Quartermaster Clank found a strange pirate logbook. Solve these word problems about the stolen cargo to decode 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
170
370
900
430
3000
500
20
T
170
900
130
300
900
2300
230
300
T
170
110
2300
900
20
30
500
20
90
3000
T
170
50
20
230
5000
370
300
500
Round 171 to the nearest tenT
Round 307 to the nearest hundredO
Round 371 to the nearest tenH
Round 94 to the nearest tenV
Round 2,317 to the nearest hundredS
Round 542 to the nearest hundredR
Round 2,845 to the nearest thousandI
Round 4,814 to the nearest thousandC
Round 232 to the nearest tenN
Round 48 to the nearest tenY
Round 134 to the nearest tenD
Round 32 to the nearest tenG
Round 112 to the nearest tenU
Round 890 to the nearest hundredE
Round 430 to the nearest tenP
Round 16 to the nearest tenA
0/16 letters found
Clue 2
Word problems
Our long-range radar only shows approximate numbers. Round these coordinates to the nearest ten to pinpoint the thief's direction.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Awitnesssawthevillainwas .
L
8
50
45
43
50
80
50
54
50
49
54
O
R
B
L
8
I
49
K
54
Quartermaster Clank lined up 4 rows of 2 laser cutlasses. How many laser cutlasses in all?L
Quartermaster Clank lined up 9 rows of 6 space doubloons. How many space doubloons in all?S
Quartermaster Clank lined up 10 rows of 8 dino batteries. How many dino batteries in all?Y
Quartermaster Clank lined up 5 rows of 10 space doubloons. How many space doubloons in all?E
Quartermaster Clank lined up 9 rows of 5 star maps. How many star maps in all?F
Quartermaster Clank found 19 space doubloons yesterday and 30 more today. How many space doubloons in all?N
There were 68 space doubloons. 25 were used up. How many space doubloons are left?T
0/7 letters found
Clue 3
Addition
The scrappers need to combine their piles of spare battery packs. Add up these energy reserves to unlock the pirate ship's cargo manifest.
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
8484
6603
9623
4918
2465
5908
7543
3704
2777
2091
6603
6195
2777
2091
7543
2465
9393
7543
B
8484
2777
9623
7739
2185
9393
2185
5908
2465
9393
7610
5170 + 3314 =B
4118 + 5505 =I
2623 + 5116 =N
5319 + 2291 =M
2309 + 5234 =S
2029 + 1675 =O
2735 + 3868 =R
2760 + 3435 =F
5757 + 3636 =E
1937 + 840 =L
730 + 1361 =A
1222 + 963 =D
3404 + 2504 =T
2124 + 2794 =G
1614 + 851 =H
0/15 letters found
Clue 4
Subtraction
Some oil canisters were stolen from our supply locker. Subtract the remaining cans from the total to find out what is missing.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
S
5216
6684
7924
7062
6570
2842
3569
4180
4180
3998
3768
1839
7924
3768
3998
S
5216
1839
3998
3768
3998
6312
3998
2247
3085
8728
3998
6684
7924
7062
1657
10170 - 4954 =S
7394 - 1082 =L
11774 - 4712 =N
6025 - 2027 =E
7189 - 505 =H
12393 - 4469 =I
4418 - 2761 =D
6490 - 2921 =O
6409 - 2229 =P
6103 - 3261 =C
3630 - 1791 =W
11284 - 2556 =B
6995 - 4748 =F
6953 - 3868 =T
5642 - 1874 =R
10933 - 4363 =Y
0/16 letters found
Clue 5
Division facts (1-12) — the last clue
We recovered a crate of energy cells that must be shared equally among the crew. Divide the cells to reveal 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
4 ÷ 4 = ?
30 ÷ 6 = ?
132 ÷ 11 = ?
77 ÷ 7 = ?
33 ÷ 11 = ?
27 ÷ 3 = ?
28 ÷ 4 = ?
24 ÷ 6 = ?
100 ÷ 10 = ?
20 ÷ 10 = ?
72 ÷ 9 = ?
Step 2 — cross out the sentence with each answer
1.The villain slinks through the ventilation shafts, then swipes the golden plasma gear.
2.The villain stomps onboard with heavy robotic claws, then grabs the starship energy cores.
3.The villain slinks through the ventilation shafts, then grabs the starship energy cores.
4.The villain smashes through the blast doors, then swipes the golden plasma gear.
5.The villain charges the security forcefield, then pockets the cosmic compass.
6.The villain smashes through the blast doors, then steals the secret galaxy maps.
7.The villain charges the security forcefield, then grabs the starship energy cores.
8.The villain slinks through the ventilation shafts, then pockets the cosmic compass.
9.The villain sails silently through the cargo bay window, then grabs the starship energy cores.
10.The villain smashes through the blast doors, then grabs the starship energy cores.
11.The villain slinks through the ventilation shafts, then steals the secret galaxy maps.
12.The villain charges the security forcefield, then steals the secret galaxy maps.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Cosmic Robo-Dino Heist
Culprit: Volt Raptor (Triceratops Armor · Plasma Cannon · Left eye sensor blinks · Shiny copper wires · Bright solar flashes)
- Clue 1 (Rounding): "THE PIRATE DOES NOT USE A GRAVITY ANCHOR"Round 171 to the nearest ten = 170 (T) · Round 307 to the nearest hundred = 300 (O) · Round 371 to the nearest ten = 370 (H) · Round 94 to the nearest ten = 90 (V) · Round 2,317 to the nearest hundred = 2300 (S) · Round 542 to the nearest hundred = 500 (R) · Round 2,845 to the nearest thousand = 3000 (I) · Round 4,814 to the nearest thousand = 5000 (C) · Round 232 to the nearest ten = 230 (N) · Round 48 to the nearest ten = 50 (Y) · Round 134 to the nearest ten = 130 (D) · Round 32 to the nearest ten = 30 (G) · Round 112 to the nearest ten = 110 (U) · Round 890 to the nearest hundred = 900 (E) · Round 430 to the nearest ten = 430 (P) · Round 16 to the nearest ten = 20 (A)
- Clue 2 (Word problems): "LEFT EYE SENSOR BLINKS"Quartermaster Clank lined up 4 rows of 2 laser cutlasses. How many laser cutlasses in all? = 8 (L) · Quartermaster Clank lined up 9 rows of 6 space doubloons. How many space doubloons in all? = 54 (S) · Quartermaster Clank lined up 10 rows of 8 dino batteries. How many dino batteries in all? = 80 (Y) · Quartermaster Clank lined up 5 rows of 10 space doubloons. How many space doubloons in all? = 50 (E) · Quartermaster Clank lined up 9 rows of 5 star maps. How many star maps in all? = 45 (F) · Quartermaster Clank found 19 space doubloons yesterday and 30 more today. How many space doubloons in all? = 49 (N) · There were 68 space doubloons. 25 were used up. How many space doubloons are left? = 43 (T)
- Clue 3 (Addition): "BRIGHT SOLAR FLASHES BLINDED THEM"5170 + 3314 = 8484 (B) · 4118 + 5505 = 9623 (I) · 2623 + 5116 = 7739 (N) · 5319 + 2291 = 7610 (M) · 2309 + 5234 = 7543 (S) · 2029 + 1675 = 3704 (O) · 2735 + 3868 = 6603 (R) · 2760 + 3435 = 6195 (F) · 5757 + 3636 = 9393 (E) · 1937 + 840 = 2777 (L) · 730 + 1361 = 2091 (A) · 1222 + 963 = 2185 (D) · 3404 + 2504 = 5908 (T) · 2124 + 2794 = 4918 (G) · 1614 + 851 = 2465 (H)
- Clue 4 (Subtraction): "SHINY COPPER WIRES WERE LEFT BEHIND"10170 - 4954 = 5216 (S) · 7394 - 1082 = 6312 (L) · 11774 - 4712 = 7062 (N) · 6025 - 2027 = 3998 (E) · 7189 - 505 = 6684 (H) · 12393 - 4469 = 7924 (I) · 4418 - 2761 = 1657 (D) · 6490 - 2921 = 3569 (O) · 6409 - 2229 = 4180 (P) · 6103 - 3261 = 2842 (C) · 3630 - 1791 = 1839 (W) · 11284 - 2556 = 8728 (B) · 6995 - 4748 = 2247 (F) · 6953 - 3868 = 3085 (T) · 5642 - 1874 = 3768 (R) · 10933 - 4363 = 6570 (Y)
- Clue 5 (Division facts (1-12)): surviving statement (box 6) → Volt Raptor4 ÷ 4 = 1 · 30 ÷ 6 = 5 · 132 ÷ 11 = 12 · 77 ÷ 7 = 11 · 33 ÷ 11 = 3 · 27 ÷ 3 = 9 · 28 ÷ 4 = 7 · 24 ÷ 6 = 4 · 100 ÷ 10 = 10 · 20 ÷ 10 = 2 · 72 ÷ 9 = 8
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Rounding, Word problems, Addition, Subtraction, Division
- Reading level
- grades 3-4
- Theme
- The Cosmic Robo-Dino Heist — set in The Rusty Nebula
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects