🚀 SpaceGrade 4Reading: grades 3-4SubtractionRoundingAdditionMultiplicationDivision

The Starlight Base Mystery

A glowing cosmic crystal vanished from the vault at Starlight Lunar Outpost! Help the Starlight Squad solve the clues and find out which crew member took it.

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 Tool	Secondary Gear	Scanner Grip	Spacesuit Hair	Distraction
Scout Rigel	Gravity Boots	Cosmic Compass	Right-Handed Scanner	Cyan Hair	Bright Flare Dazzle
Doctor Ray	Laser Cutter	Cosmic Compass	Right-Handed Scanner	Magenta Hair	Radio Noise Glitch
Cadet Cosmo	Jetpack	Solar Scoop	Left-Handed Scanner	Cyan Hair	Bright Flare Dazzle
Pilot Venus	Plasma Shield	Asteroid Magnet	Right-Handed Scanner	Cyan Hair	Space Dust Sneeze
Officer Comet	Plasma Shield	Asteroid Magnet	Right-Handed Scanner	Magenta Hair	Space Dust Sneeze
Astronaut Buzz	Jetpack	Solar Scoop	Left-Handed Scanner	Cyan Hair	Radio Noise Glitch
Navigator Neil	Gravity Boots	Asteroid Magnet	Left-Handed Scanner	Magenta Hair	Space Dust Sneeze
Cadet Stella	Laser Cutter	Asteroid Magnet	Right-Handed Scanner	Magenta Hair	Bright Flare Dazzle
Techie Tycho	Jetpack	Cosmic Compass	Left-Handed Scanner	Magenta Hair	Space Dust Sneeze
Rover Ruby	Laser Cutter	Cosmic Compass	Left-Handed Scanner	Cyan Hair	Radio Noise Glitch
Pilot Orion	Laser Cutter	Solar Scoop	Left-Handed Scanner	Magenta Hair	Space Dust Sneeze
Cadet Pulsar	Plasma Shield	Cosmic Compass	Left-Handed Scanner	Magenta Hair	Space Dust Sneeze
Pilot Mae	Gravity Boots	Cosmic Compass	Right-Handed Scanner	Cyan Hair	Space Dust Sneeze
Cosmo Clara	Jetpack	Comet Net	Left-Handed Scanner	Silver Hair	Space Dust Sneeze
Officer Hal	Laser Cutter	Asteroid Magnet	Left-Handed Scanner	Silver Hair	Space Dust Sneeze
Ranger Jax	Starlight Scanner	Moon Drill	Right-Handed Scanner	Magenta Hair	Space Dust Sneeze
Cadet Sally	Gravity Boots	Moon Drill	Left-Handed Scanner	Magenta Hair	Space Dust Sneeze
Captain Nova	Jetpack	Moon Drill	Left-Handed Scanner	Cyan Hair	Bright Flare Dazzle
Agent Astro	Plasma Shield	Solar Scoop	Right-Handed Scanner	Silver Hair	Space Dust Sneeze
Commander Leo	Starlight Scanner	Solar Scoop	Right-Handed Scanner	Silver Hair	Space Dust Sneeze
Engineer Sam	Laser Cutter	Cosmic Compass	Left-Handed Scanner	Magenta Hair	Bright Flare Dazzle

Clue 1

Subtraction

We measured how much rocket fuel was missing from the main tank to reveal our first hint.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

6731

1145

2580

2975

3078

2618

1387

3078

3283

5186

3627

2580

4031

3283

3627

6731

3405

4031

2580

1387

5286

3627

3283

5186

5296

3078

2618

7126 - 395 =T

6117 - 931 =D

3596 - 1016 =E

5223 - 2248 =V

5679 - 383 =R

6259 - 973 =M

5425 - 2142 =N

4608 - 1530 =I

4969 - 3582 =A

7190 - 3159 =S

5830 - 4685 =H

6381 - 2754 =O

4388 - 983 =U

2919 - 301 =L

0/14 letters found

Clue 2

Rounding

The outer space radar screen only displays rounded distance numbers for safety.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

290

9000

3000

370

300

110

1700

290

700

300

5000

3000

200

1700

370

230

300

230

110

1300

1700

370

300

3700

9000

370

4300

110

300

Round 288 to the nearest tenW

Round 4,835 to the nearest thousandF

Round 3,697 to the nearest hundredR

Round 2,972 to the nearest thousandT

Round 1,711 to the nearest hundredA

Round 1,251 to the nearest hundredC

Round 206 to the nearest hundredH

Round 108 to the nearest tenS

Round 373 to the nearest tenN

Round 272 to the nearest hundredE

Round 4,320 to the nearest hundredU

Round 226 to the nearest tenD

Round 683 to the nearest hundredL

Round 8,834 to the nearest thousandI

0/14 letters found

Clue 3

Addition

We added up all the stray energy sparks left near the airlock door.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

5573

5616

4604

9023

5616

9207

5047

9207

5934

5681

5934

8047

9169

4764

2716

7697

8047

4926

5047

5791

9023

5791

5047

2255

5934

9207

5934

1848 + 3725 =V

2855 + 1749 =L

3026 + 2590 =I

4526 + 4681 =N

2218 + 2829 =S

4046 + 1745 =T

1163 + 1553 =O

1545 + 3381 =U

4567 + 3130 =M

1099 + 1156 =C

2190 + 2574 =R

3742 + 5427 =F

3374 + 2307 =Z

3669 + 2265 =E

3664 + 4383 =D

3056 + 5967 =A

0/16 letters found

Clue 4

Multiplication facts (1-12)

The solar panels were laid out in neat matching rows across the flight deck.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

110

121

110

100

7 × 3 =M

11 × 11 =F

3 × 9 =N

4 × 2 =R

5 × 11 =E

5 × 4 =U

10 × 10 =L

5 × 10 =W

9 × 7 =D

7 × 7 =A

3 × 5 =H

1 × 6 =S

5 × 9 =O

2 × 5 =K

10 × 11 =T

12 × 7 =G

12 × 6 =C

1 × 7 =I

0/18 letters found

Clue 5

Division facts (1-12) — the last clue

We shared the emergency space rations equally among the research teams.

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

30 ÷ 10 = ?

32 ÷ 8 = ?

108 ÷ 9 = ?

56 ÷ 7 = ?

66 ÷ 6 = ?

22 ÷ 11 = ?

7 ÷ 7 = ?

72 ÷ 12 = ?

21 ÷ 3 = ?

60 ÷ 12 = ?

70 ÷ 7 = ?

Step 2 — cross out the sentence with each answer

1.The villain scanned the lock frequency, then pulled the star chart safe.

2.The villain deflected the alarm beam, then caught the flying space probe.

3.The villain deflected the alarm beam, then steered toward the escape pod.

4.The villain sliced the vault hatch, then scooped up the lunar crystal.

5.The villain flew through the cargo bay, then scooped up the lunar crystal.

6.The villain boosted over the security wall, then drilled into the core room.

7.The villain deflected the alarm beam, then scooped up the lunar crystal.

8.The villain scanned the lock frequency, then scooped up the lunar crystal.

9.The villain flew through the cargo bay, then steered toward the escape pod.

10.The villain deflected the alarm beam, then pulled the star chart safe.

11.The villain scanned the lock frequency, then drilled into the core room.

12.The villain boosted over the security wall, then pulled the star chart safe.

Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — The Starlight Base Mystery

Culprit: Techie Tycho (Jetpack · Cosmic Compass · Left-Handed Scanner · Magenta Hair · Space Dust Sneeze)

Clue 1 (Subtraction): "THE VILLAIN DOES NOT USE A MOON DRILL"
7126 - 395 = 6731 (T) · 6117 - 931 = 5186 (D) · 3596 - 1016 = 2580 (E) · 5223 - 2248 = 2975 (V) · 5679 - 383 = 5296 (R) · 6259 - 973 = 5286 (M) · 5425 - 2142 = 3283 (N) · 4608 - 1530 = 3078 (I) · 4969 - 3582 = 1387 (A) · 7190 - 3159 = 4031 (S) · 5830 - 4685 = 1145 (H) · 6381 - 2754 = 3627 (O) · 4388 - 983 = 3405 (U) · 2919 - 301 = 2618 (L)
Clue 2 (Rounding): "WITNESS SAW LEFT HANDED SCANNER IN USE"
Round 288 to the nearest ten = 290 (W) · Round 4,835 to the nearest thousand = 5000 (F) · Round 3,697 to the nearest hundred = 3700 (R) · Round 2,972 to the nearest thousand = 3000 (T) · Round 1,711 to the nearest hundred = 1700 (A) · Round 1,251 to the nearest hundred = 1300 (C) · Round 206 to the nearest hundred = 200 (H) · Round 108 to the nearest ten = 110 (S) · Round 373 to the nearest ten = 370 (N) · Round 272 to the nearest hundred = 300 (E) · Round 4,320 to the nearest hundred = 4300 (U) · Round 226 to the nearest ten = 230 (D) · Round 683 to the nearest hundred = 700 (L) · Round 8,834 to the nearest thousand = 9000 (I)
Clue 3 (Addition): "VILLAIN SNEEZED FROM DUST AT SCENE"
1848 + 3725 = 5573 (V) · 2855 + 1749 = 4604 (L) · 3026 + 2590 = 5616 (I) · 4526 + 4681 = 9207 (N) · 2218 + 2829 = 5047 (S) · 4046 + 1745 = 5791 (T) · 1163 + 1553 = 2716 (O) · 1545 + 3381 = 4926 (U) · 4567 + 3130 = 7697 (M) · 1099 + 1156 = 2255 (C) · 2190 + 2574 = 4764 (R) · 3742 + 5427 = 9169 (F) · 3374 + 2307 = 5681 (Z) · 3669 + 2265 = 5934 (E) · 3664 + 4383 = 8047 (D) · 3056 + 5967 = 9023 (A)
Clue 4 (Multiplication facts (1-12)): "MAGENTA HAIR WAS FOUND ON THE AIRLOCK"
7 × 3 = 21 (M) · 11 × 11 = 121 (F) · 3 × 9 = 27 (N) · 4 × 2 = 8 (R) · 5 × 11 = 55 (E) · 5 × 4 = 20 (U) · 10 × 10 = 100 (L) · 5 × 10 = 50 (W) · 9 × 7 = 63 (D) · 7 × 7 = 49 (A) · 3 × 5 = 15 (H) · 1 × 6 = 6 (S) · 5 × 9 = 45 (O) · 2 × 5 = 10 (K) · 10 × 11 = 110 (T) · 12 × 7 = 84 (G) · 12 × 6 = 72 (C) · 1 × 7 = 7 (I)
Clue 5 (Division facts (1-12)): surviving statement (box 9) → Techie Tycho
30 ÷ 10 = 3 · 32 ÷ 8 = 4 · 108 ÷ 9 = 12 · 56 ÷ 7 = 8 · 66 ÷ 6 = 11 · 22 ÷ 11 = 2 · 7 ÷ 7 = 1 · 72 ÷ 12 = 6 · 21 ÷ 3 = 7 · 60 ÷ 12 = 5 · 70 ÷ 7 = 10

About this mystery

Grade level: Grade 4 math
Math topics: Subtraction, Rounding, Addition, Multiplication, Division
Reading level: grades 3-4
Theme: The Starlight Base Mystery — set in Starlight Lunar Outpost
Format: Interactive online & printable worksheet with answer key
Solution: One unique, verified culprit among 21 suspects

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