🚀 SpaceGrade 3Reading: grades 3-4RoundingAdditionSubtractionMultiplicationDivision
The Mystery of the Astro-Dome Bandit
Someone sneaked into the Astro-Dome and snatched the rare golden Moon-Peach! Chief Botanist Cosmo needs your help. Look at the data pads, check the clues, and find the space bandit!
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 | Space Gear | Helmet Type | Flight Suit | Hair Glow | Weakness |
|---|---|---|---|---|---|
| Kepler | Hover Skates | Bubble Helmet | Orange Flight Suit | Sparkly Pink Glow | Moon Dust Allergy |
| Ray | Hover Skates | Gold Visor | Orange Flight Suit | Neon Green Glow | Loves Space Popcorn |
| Rocket | Magnetic Gloves | Neon Mask | Orange Flight Suit | Sparkly Pink Glow | Loves Space Popcorn |
| Sunny | Laser Lasso | Bubble Helmet | Blue Flight Suit | Neon Green Glow | Loves Space Popcorn |
| Draco | Gravity Boots | Neon Mask | Blue Flight Suit | Spiky Purple Glow | Moon Dust Allergy |
| Lyra | Hover Skates | Bubble Helmet | Orange Flight Suit | Neon Green Glow | Loves Space Popcorn |
| Zelda | Laser Lasso | Antenna Cap | Blue Flight Suit | Spiky Purple Glow | Loves Space Popcorn |
| Orion | Jetpack Backpack | Star Goggles | Blue Flight Suit | Neon Green Glow | Afraid of Robot Beeps |
| Mars | Hover Skates | Star Goggles | Orange Flight Suit | Sparkly Pink Glow | Moon Dust Allergy |
| Ziggy | Magnetic Gloves | Antenna Cap | Orange Flight Suit | Neon Green Glow | Loves Space Popcorn |
| Leo | Laser Lasso | Antenna Cap | Orange Flight Suit | Spiky Purple Glow | Loves Space Popcorn |
| Comet | Hover Skates | Bubble Helmet | Blue Flight Suit | Spiky Purple Glow | Moon Dust Allergy |
| Stella | Jetpack Backpack | Gold Visor | Orange Flight Suit | Neon Green Glow | Afraid of Robot Beeps |
| Pluto | Laser Lasso | Bubble Helmet | Orange Flight Suit | Neon Green Glow | Loves Space Popcorn |
| Astro | Jetpack Backpack | Star Goggles | Blue Flight Suit | Neon Green Glow | Loves Space Popcorn |
| Drifty | Jetpack Backpack | Gold Visor | Blue Flight Suit | Neon Green Glow | Moon Dust Allergy |
| Zara | Hover Skates | Gold Visor | Blue Flight Suit | Spiky Purple Glow | Loves Space Popcorn |
| Pip | Hover Skates | Star Goggles | Orange Flight Suit | Neon Green Glow | Afraid of Robot Beeps |
| Bixby | Jetpack Backpack | Bubble Helmet | Orange Flight Suit | Spiky Purple Glow | Moon Dust Allergy |
| Venus | Hover Skates | Star Goggles | Orange Flight Suit | Neon Green Glow | Loves Space Popcorn |
| Luna | Hover Skates | Bubble Helmet | Orange Flight Suit | Sparkly Pink Glow | Loves Space Popcorn |
Clue 1
Rounding
The starship's radar screen is fuzzy. It only shows the rounded number of miles to the bandit's runaway ship. Round this number to the nearest ten to unlock 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
3000
800
7000
300
90
8000
4000
600
T
3000
4000
70
7000
200
8000
70
T
3000
80
7000
90
400
200
T
3000
90
400
9000
70
9000
9000
20
7000
200
Round 3,296 to the nearest thousandT
Round 238 to the nearest hundredS
Round 849 to the nearest hundredH
Round 73 to the nearest tenO
Round 20 to the nearest tenL
Round 7,189 to the nearest thousandE
Round 275 to the nearest hundredB
Round 610 to the nearest hundredI
Round 9,123 to the nearest thousandG
Round 4,133 to the nearest thousandD
Round 90 to the nearest tenA
Round 383 to the nearest hundredR
Round 81 to the nearest tenW
Round 8,051 to the nearest thousandN
0/14 letters found
Clue 2
Addition
Chief Cosmo counts the empty plant pots left in the garden. By adding the red pots to the blue pots, we can decode the next security 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.
O
474
880
402
299
350
853
700
302
880
853
402
870
650
536
853
880
853
O
474
299
700
302
853
267
853
329
853
880
220 + 254 =O
157 + 193 =G
254 + 396 =S
522 + 358 =R
95 + 204 =N
433 + 267 =T
252 + 150 =A
86 + 181 =L
413 + 440 =E
399 + 471 =D
128 + 174 =H
237 + 299 =W
104 + 225 =V
0/13 letters found
Clue 3
Subtraction
The bandit dropped some heavy cargo pods to speed up their escape. If we subtract the dropped pods from the total pods, we get the key to open the vault.
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
470
613
404
362
776
374
830
274
362
274
515
362
773
374
819
613
773
374
613
136
172
154
374
734
607
613
136
438
236
558 - 88 =W
751 - 144 =H
1130 - 396 =T
1166 - 347 =K
527 - 355 =S
410 - 174 =B
657 - 44 =E
997 - 224 =R
1169 - 393 =U
457 - 19 =A
1177 - 347 =D
434 - 72 =O
656 - 282 =N
796 - 281 =C
516 - 112 =F
520 - 384 =L
353 - 199 =I
656 - 382 =P
0/18 letters found
Clue 4
Multiplication facts (1-12)
The launchpad has several rows of solar panels. Multiply the number of rows by the panels in each row to find the power code for this clue pad.
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
16
84
14
50
50
45
9
A
16
60
14
4
A
16
49
80
45
77
9
50
66
80
45
77
14
80
100
55
A
16
56
8 × 2 =A
5 × 10 =E
6 × 11 =C
7 × 7 =S
5 × 11 =P
7 × 2 =R
3 × 3 =H
8 × 7 =D
12 × 7 =G
5 × 12 =I
5 × 9 =N
8 × 10 =O
2 × 2 =W
7 × 11 =T
10 × 10 =L
0/15 letters found
Clue 5
Division facts (1-12) — the last clue
A group of cute space monkeys found some glow-berries and shared them equally. Find how many berries each monkey got to unlock the final computer screen.
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
77 ÷ 11 = ?
48 ÷ 8 = ?
22 ÷ 2 = ?
4 ÷ 2 = ?
15 ÷ 5 = ?
70 ÷ 7 = ?
72 ÷ 6 = ?
81 ÷ 9 = ?
20 ÷ 4 = ?
11 ÷ 11 = ?
32 ÷ 4 = ?
Step 2 — cross out the sentence with each answer
1.The villain stomped with gravity boots, then fogged up a bubble helmet.
2.The villain climbed with magnetic gloves, then adjusted a neon mask.
3.The villain zoomed with a jetpack backpack, then polished a gold visor.
4.The villain glided on hover skates, then fogged up a bubble helmet.
5.The villain climbed with magnetic gloves, then polished a gold visor.
6.The villain climbed with magnetic gloves, then wiggled an antenna cap.
7.The villain swung a laser lasso, then fogged up a bubble helmet.
8.The villain climbed with magnetic gloves, then fogged up a bubble helmet.
9.The villain stomped with gravity boots, then polished a gold visor.
10.The villain swung a laser lasso, then adjusted a neon mask.
11.The villain glided on hover skates, then polished a gold visor.
12.The villain climbed with magnetic gloves, then adjusted some star goggles.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mystery of the Astro-Dome Bandit
Culprit: Lyra (Hover Skates · Bubble Helmet · Orange Flight Suit · Neon Green Glow · Loves Space Popcorn)
- Clue 1 (Rounding): "THE BANDIT DOES NOT WEAR STAR GOGGLES"Round 3,296 to the nearest thousand = 3000 (T) · Round 238 to the nearest hundred = 200 (S) · Round 849 to the nearest hundred = 800 (H) · Round 73 to the nearest ten = 70 (O) · Round 20 to the nearest ten = 20 (L) · Round 7,189 to the nearest thousand = 7000 (E) · Round 275 to the nearest hundred = 300 (B) · Round 610 to the nearest hundred = 600 (I) · Round 9,123 to the nearest thousand = 9000 (G) · Round 4,133 to the nearest thousand = 4000 (D) · Round 90 to the nearest ten = 90 (A) · Round 383 to the nearest hundred = 400 (R) · Round 81 to the nearest ten = 80 (W) · Round 8,051 to the nearest thousand = 8000 (N)
- Clue 2 (Addition): "ORANGE THREADS WERE ON THE LEVER"220 + 254 = 474 (O) · 157 + 193 = 350 (G) · 254 + 396 = 650 (S) · 522 + 358 = 880 (R) · 95 + 204 = 299 (N) · 433 + 267 = 700 (T) · 252 + 150 = 402 (A) · 86 + 181 = 267 (L) · 413 + 440 = 853 (E) · 399 + 471 = 870 (D) · 128 + 174 = 302 (H) · 237 + 299 = 536 (W) · 104 + 225 = 329 (V)
- Clue 3 (Subtraction): "WE FOUND POPCORN KERNELS IN THE LAB"558 - 88 = 470 (W) · 751 - 144 = 607 (H) · 1130 - 396 = 734 (T) · 1166 - 347 = 819 (K) · 527 - 355 = 172 (S) · 410 - 174 = 236 (B) · 657 - 44 = 613 (E) · 997 - 224 = 773 (R) · 1169 - 393 = 776 (U) · 457 - 19 = 438 (A) · 1177 - 347 = 830 (D) · 434 - 72 = 362 (O) · 656 - 282 = 374 (N) · 796 - 281 = 515 (C) · 516 - 112 = 404 (F) · 520 - 384 = 136 (L) · 353 - 199 = 154 (I) · 656 - 382 = 274 (P)
- Clue 4 (Multiplication facts (1-12)): "A GREEN HAIR WAS ON THE CONTROL PAD"8 × 2 = 16 (A) · 5 × 10 = 50 (E) · 6 × 11 = 66 (C) · 7 × 7 = 49 (S) · 5 × 11 = 55 (P) · 7 × 2 = 14 (R) · 3 × 3 = 9 (H) · 8 × 7 = 56 (D) · 12 × 7 = 84 (G) · 5 × 12 = 60 (I) · 5 × 9 = 45 (N) · 8 × 10 = 80 (O) · 2 × 2 = 4 (W) · 7 × 11 = 77 (T) · 10 × 10 = 100 (L)
- Clue 5 (Division facts (1-12)): surviving statement (box 4) → Lyra77 ÷ 11 = 7 · 48 ÷ 8 = 6 · 22 ÷ 2 = 11 · 4 ÷ 2 = 2 · 15 ÷ 5 = 3 · 70 ÷ 7 = 10 · 72 ÷ 6 = 12 · 81 ÷ 9 = 9 · 20 ÷ 4 = 5 · 11 ÷ 11 = 1 · 32 ÷ 4 = 8
About this mystery
- Grade level
- Grade 3 math
- Math topics
- Rounding, Addition, Subtraction, Multiplication, Division
- Reading level
- grades 3-4
- Theme
- The Mystery of the Astro-Dome Bandit — set in the Astro-Dome Space Station
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects