🚀 SpaceGrade 4Reading: grades 3-4RoundingAdditionSubtractionMultiplicationDivision
The Mystery of Starlight Station
A mysterious intruder snuck into Starlight Space Station and scrambled the navigation computer! Station Commander Sarah needs your math skills to decode the clues and track down the culprit before the shuttle departs.
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 | Main Gadget | Extra Gear | Glove Hand | Hair Style | Defense Used |
|---|---|---|---|---|---|
| Ellen Ochoa | Gravity Boots | Comet Beacon | Right-handed glove | Silver Space Mullet | Siren Alarm |
| Eileen Collins | Plasma Torch | Solar Panel | Right-handed glove | Cosmic Blue Ponytail | Siren Alarm |
| Sunita Williams | Plasma Torch | Asteroid Net | Left-handed glove | Neon Green Buzzcut | Space Magnet |
| Chris Hadfield | Gravity Boots | Moon Rover | Right-handed glove | Neon Green Buzzcut | Siren Alarm |
| Alan Shepard | Jetpack Booster | Zero-G Drone | Left-handed glove | Neon Green Buzzcut | Siren Alarm |
| Yuri Gagarin | Jetpack Booster | Asteroid Net | Right-handed glove | Cosmic Blue Ponytail | Siren Alarm |
| John Glenn | Laser Cutter | Moon Rover | Right-handed glove | Silver Space Mullet | Siren Alarm |
| Guion Bluford | Gravity Boots | Zero-G Drone | Right-handed glove | Cosmic Blue Ponytail | Siren Alarm |
| Christina Koch | Laser Cutter | Moon Rover | Left-handed glove | Cosmic Blue Ponytail | Siren Alarm |
| Leland Melvin | Laser Cutter | Zero-G Drone | Right-handed glove | Cosmic Blue Ponytail | Siren Alarm |
| Mae Jemison | Laser Cutter | Moon Rover | Right-handed glove | Neon Green Buzzcut | Flashlight Beam |
| Victor Glover | Gravity Boots | Comet Beacon | Left-handed glove | Cosmic Blue Ponytail | Siren Alarm |
| Neil Armstrong | Laser Cutter | Asteroid Net | Right-handed glove | Neon Green Buzzcut | Space Magnet |
| Anousheh Ansari | Laser Cutter | Comet Beacon | Left-handed glove | Silver Space Mullet | Flashlight Beam |
| Jeanette Epps | Laser Cutter | Zero-G Drone | Right-handed glove | Cosmic Blue Ponytail | Space Magnet |
| Kalpana Chawla | Gravity Boots | Moon Rover | Right-handed glove | Cosmic Blue Ponytail | Siren Alarm |
| Peggy Whitson | Plasma Torch | Asteroid Net | Left-handed glove | Silver Space Mullet | Space Magnet |
| Buzz Aldrin | Laser Cutter | Zero-G Drone | Right-handed glove | Silver Space Mullet | Space Magnet |
| Sally Ride | Laser Cutter | Moon Rover | Right-handed glove | Cosmic Blue Ponytail | Flashlight Beam |
| Kjell Lindgren | Laser Cutter | Comet Beacon | Right-handed glove | Cosmic Blue Ponytail | Flashlight Beam |
| Jessica Meir | Gravity Boots | Moon Rover | Right-handed glove | Silver Space Mullet | Flashlight Beam |
Clue 1
Rounding
The station radar screen only displays sensor distance numbers rounded to the nearest hundred.
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
2900
9000
900
1700
170
1100
5000
900
3000
170
900
50
30
170
T
2900
5000
50
900
430
50
170
500
430
1700
130
430
30
900
500
Round 2,852 to the nearest hundredT
Round 30 to the nearest tenN
Round 133 to the nearest tenP
Round 1,079 to the nearest hundredG
Round 170 to the nearest tenO
Round 2,982 to the nearest thousandD
Round 904 to the nearest hundredE
Round 1,710 to the nearest hundredR
Round 430 to the nearest tenA
Round 52 to the nearest tenS
Round 496 to the nearest hundredL
Round 8,697 to the nearest thousandH
Round 4,990 to the nearest thousandU
0/13 letters found
Clue 2
Addition
The cadet tallied up all the extra space supplies collected during the morning shift.
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
5758
6856
9522
5164
4569
9145
8243
9783
S
5758
6856
5071
S
5758
5021
4569
S
5758
S
5758
2427
5559
2427
4569
9145
5930
6287
8243
6287
2427
5071
6162
6856
6162
5930
8851
5021
7286
6856
3446 + 2312 =S
6304 + 3218 =C
3642 + 5209 =L
3986 + 5159 =I
2607 + 1962 =R
2205 + 3725 =G
4961 + 2325 =V
3261 + 3595 =E
3348 + 2939 =H
1917 + 3247 =U
6487 + 3296 =Y
2561 + 3601 =D
1832 + 3239 =N
3162 + 2397 =W
1213 + 1214 =A
1962 + 3059 =O
2762 + 5481 =T
0/17 letters found
Clue 3
Subtraction
The chief engineer calculated how much fuel remained after the surprise blast.
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
2237
2758
3726
6455
3726
5617
2758
3726
6475
2992
5262
3726
2758
A
2237
5262
1899
6475
3726
5617
A
2237
7496
A
2237
6475
4215
6555
8500
5262
6555
8500
7920
6555
7415
3726
4215
7187 - 4950 =A
3916 - 2017 =I
4423 - 1665 =D
9840 - 3385 =F
11541 - 3621 =P
7645 - 3919 =E
7245 - 1983 =S
7457 - 42 =H
8551 - 1996 =T
8947 - 1451 =L
8411 - 2794 =N
6315 - 2100 =M
5622 - 2630 =U
7867 - 1392 =R
11751 - 3251 =O
0/15 letters found
Clue 4
Multiplication facts (1-12)
The crew counted supply crates stored in neat rows inside the cargo bay.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
C
2
35
14
110
44
C
2
120
50
42
84
16
70
44
77
108
70
14
50
84
20
15
35
80
15
16
84
16
84
50
110
84
15
2 × 1 =C
9 × 12 =W
7 × 11 =R
10 × 12 =B
7 × 6 =U
10 × 5 =L
12 × 7 =E
8 × 2 =H
3 × 5 =T
7 × 2 =S
10 × 2 =F
5 × 7 =O
11 × 4 =I
10 × 11 =M
10 × 8 =N
7 × 10 =A
0/16 letters found
Clue 5
Division facts (1-12) — the last clue
The captain divided the extra oxygen tanks equally among the escape pods.
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
44 ÷ 11 = ?
1 ÷ 1 = ?
55 ÷ 11 = ?
121 ÷ 11 = ?
36 ÷ 12 = ?
40 ÷ 5 = ?
90 ÷ 9 = ?
7 ÷ 1 = ?
144 ÷ 12 = ?
12 ÷ 2 = ?
45 ÷ 5 = ?
Step 2 — cross out the sentence with each answer
1.The villain blasted off with a jetpack booster, then cast an asteroid net.
2.The villain powered up their gravity boots, then drove a moon rover.
3.The villain fired up a plasma torch, then launched a comet beacon.
4.The villain powered up their gravity boots, then piloted a zero g drone.
5.The villain sliced with a laser cutter, then piloted a zero g drone.
6.The villain powered up their gravity boots, then deployed a solar panel.
7.The villain sliced with a laser cutter, then cast an asteroid net.
8.The villain powered up their gravity boots, then cast an asteroid net.
9.The villain sliced with a laser cutter, then deployed a solar panel.
10.The villain activated a starlight shield, then piloted a zero g drone.
11.The villain fired up a plasma torch, then piloted a zero g drone.
12.The villain activated a starlight shield, then drove a moon rover.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mystery of Starlight Station
Culprit: Kalpana Chawla (Gravity Boots · Moon Rover · Right-handed glove · Cosmic Blue Ponytail · Siren Alarm)
- Clue 1 (Rounding): "THE ROGUE DOES NOT USE A SOLAR PANEL"Round 2,852 to the nearest hundred = 2900 (T) · Round 30 to the nearest ten = 30 (N) · Round 133 to the nearest ten = 130 (P) · Round 1,079 to the nearest hundred = 1100 (G) · Round 170 to the nearest ten = 170 (O) · Round 2,982 to the nearest thousand = 3000 (D) · Round 904 to the nearest hundred = 900 (E) · Round 1,710 to the nearest hundred = 1700 (R) · Round 430 to the nearest ten = 430 (A) · Round 52 to the nearest ten = 50 (S) · Round 496 to the nearest hundred = 500 (L) · Round 8,697 to the nearest thousand = 9000 (H) · Round 4,990 to the nearest thousand = 5000 (U)
- Clue 2 (Addition): "SECURITY SENSORS SAW A RIGHT HANDED GLOVE"3446 + 2312 = 5758 (S) · 6304 + 3218 = 9522 (C) · 3642 + 5209 = 8851 (L) · 3986 + 5159 = 9145 (I) · 2607 + 1962 = 4569 (R) · 2205 + 3725 = 5930 (G) · 4961 + 2325 = 7286 (V) · 3261 + 3595 = 6856 (E) · 3348 + 2939 = 6287 (H) · 1917 + 3247 = 5164 (U) · 6487 + 3296 = 9783 (Y) · 2561 + 3601 = 6162 (D) · 1832 + 3239 = 5071 (N) · 3162 + 2397 = 5559 (W) · 1213 + 1214 = 2427 (A) · 1962 + 3059 = 5021 (O) · 2762 + 5481 = 8243 (T)
- Clue 3 (Subtraction): "A DEFENDER USED A SIREN ALARM TO STOP THEM"7187 - 4950 = 2237 (A) · 3916 - 2017 = 1899 (I) · 4423 - 1665 = 2758 (D) · 9840 - 3385 = 6455 (F) · 11541 - 3621 = 7920 (P) · 7645 - 3919 = 3726 (E) · 7245 - 1983 = 5262 (S) · 7457 - 42 = 7415 (H) · 8551 - 1996 = 6555 (T) · 8947 - 1451 = 7496 (L) · 8411 - 2794 = 5617 (N) · 6315 - 2100 = 4215 (M) · 5622 - 2630 = 2992 (U) · 7867 - 1392 = 6475 (R) · 11751 - 3251 = 8500 (O)
- Clue 4 (Multiplication facts (1-12)): "COSMIC BLUE HAIR WAS LEFT ON THE HELMET"2 × 1 = 2 (C) · 9 × 12 = 108 (W) · 7 × 11 = 77 (R) · 10 × 12 = 120 (B) · 7 × 6 = 42 (U) · 10 × 5 = 50 (L) · 12 × 7 = 84 (E) · 8 × 2 = 16 (H) · 3 × 5 = 15 (T) · 7 × 2 = 14 (S) · 10 × 2 = 20 (F) · 5 × 7 = 35 (O) · 11 × 4 = 44 (I) · 10 × 11 = 110 (M) · 10 × 8 = 80 (N) · 7 × 10 = 70 (A)
- Clue 5 (Division facts (1-12)): surviving statement (box 2) → Kalpana Chawla44 ÷ 11 = 4 · 1 ÷ 1 = 1 · 55 ÷ 11 = 5 · 121 ÷ 11 = 11 · 36 ÷ 12 = 3 · 40 ÷ 5 = 8 · 90 ÷ 9 = 10 · 7 ÷ 1 = 7 · 144 ÷ 12 = 12 · 12 ÷ 2 = 6 · 45 ÷ 5 = 9
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Rounding, Addition, Subtraction, Multiplication, Division
- Reading level
- grades 3-4
- Theme
- The Mystery of Starlight Station — set in Starlight Space Station
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects