🚀 SpaceGrade 3Reading: grades 3-4RoundingAdditionSubtractionMultiplicationDivision
The Great Lunar Crystal Heist
A mischievous space bandit sneaked into Astro Base Alpha and snatched the glowing starlight crystal! Examine the evidence log to catch the culprit.
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 | Thruster Pack | Scanner Tool | Dominated Hand | Visor Tint | Trap Gadget |
|---|---|---|---|---|---|
| Sally Ride | Plasma Booster | Starlight Ray | Left Handed | Copper Helmet | Magnetic Trap |
| Zephyr Ray | Solar Skates | Comet Radar | Left Handed | Copper Helmet | Magnetic Trap |
| Yuri Gagarin | Plasma Booster | Laser Cutter | Left Handed | Cobalt Helmet | Magnetic Trap |
| Jax Comet | Plasma Booster | Comet Radar | Right Handed | Silver Helmet | Photon Net |
| Mae Jemison | Gravity Boots | Starlight Ray | Left Handed | Copper Helmet | Magnetic Trap |
| Stella Ray | Gravity Boots | Nebula Scope | Right Handed | Silver Helmet | Photon Net |
| Kalpana Chawla | Warp Drive | Comet Radar | Left Handed | Cobalt Helmet | Stun Beam |
| Lyra Flare | Ion Jetpack | Nebula Scope | Right Handed | Cobalt Helmet | Stun Beam |
| Eileen Collins | Gravity Boots | Nebula Scope | Right Handed | Cobalt Helmet | Photon Net |
| Orion Pax | Gravity Boots | Laser Cutter | Left Handed | Copper Helmet | Magnetic Trap |
| Cosmo Vance | Ion Jetpack | Laser Cutter | Left Handed | Copper Helmet | Stun Beam |
| Nova Star | Plasma Booster | Comet Radar | Left Handed | Copper Helmet | Magnetic Trap |
| Guion Bluford | Plasma Booster | Nebula Scope | Left Handed | Copper Helmet | Magnetic Trap |
| Peggy Whitson | Solar Skates | Starlight Ray | Right Handed | Silver Helmet | Photon Net |
| John Glenn | Plasma Booster | Laser Cutter | Right Handed | Copper Helmet | Magnetic Trap |
| Alan Shepard | Gravity Boots | Laser Cutter | Left Handed | Copper Helmet | Photon Net |
| Chris Hadfield | Plasma Booster | Comet Radar | Right Handed | Silver Helmet | Magnetic Trap |
| Buzz Aldrin | Gravity Boots | Nebula Scope | Right Handed | Copper Helmet | Stun Beam |
| Astra Moon | Gravity Boots | Nebula Scope | Left Handed | Silver Helmet | Magnetic Trap |
| Caelum Cruz | Plasma Booster | Comet Radar | Right Handed | Copper Helmet | Magnetic Trap |
| Solene Vane | Solar Skates | Meteor Shield | Right Handed | Cobalt Helmet | Magnetic Trap |
Clue 1
Rounding
The station radar panel rounds distance numbers to the nearest ten.
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
30
3000
800
600
300
600
80
800
5000
T
30
70
700
800
600
900
700
T
30
300
600
800
8000
600
T
30
8000
4000
200
90
6000
3000
T
30
4000
8000
500
Round 27 to the nearest tenT
Round 80 to the nearest tenP
Round 600 to the nearest hundredS
Round 780 to the nearest hundredE
Round 4,543 to the nearest thousandC
Round 238 to the nearest hundredL
Round 4,175 to the nearest thousandR
Round 464 to the nearest hundredY
Round 87 to the nearest tenI
Round 282 to the nearest hundredU
Round 72 to the nearest tenD
Round 7,716 to the nearest thousandA
Round 937 to the nearest hundredN
Round 3,037 to the nearest thousandH
Round 712 to the nearest hundredO
Round 5,798 to the nearest thousandG
0/16 letters found
Clue 2
Addition
Commander Astra tallied all oxygen tanks brought onboard today.
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
934
928
491
581
508
603
603
603
480
W
934
480
778
508
805
491
637
480
581
641
508
641
384
928
778
778
480
928
581
778
508
480
384
508
592 + 342 =W
161 + 347 =E
416 + 187 =S
402 + 239 =D
585 + 343 =I
337 + 154 =T
410 + 227 =H
322 + 259 =N
119 + 265 =V
349 + 429 =L
223 + 257 =A
385 + 420 =F
0/12 letters found
Clue 3
Subtraction
Cadet Nova checked how many moon rocks remained after the raid.
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
802
694
600
685
406
157
157
889
406
599
289
889
478
478
T
802
895
252
252
600
421
775
467
889
801
889
215
599
600
T
802
406
648
T
802
590
889
252
1128 - 326 =T
1170 - 369 =M
733 - 266 =Y
818 - 397 =D
417 - 128 =W
1027 - 342 =V
592 - 186 =I
949 - 60 =A
1234 - 339 =O
599 - 9 =R
1078 - 303 =B
772 - 172 =E
921 - 227 =H
559 - 307 =P
529 - 51 =S
621 - 22 =N
1035 - 387 =C
283 - 126 =L
492 - 277 =G
0/19 letters found
Clue 4
Multiplication facts (1-12)
Engineer Leo counted solar panels arranged in equal rows.
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
40
14
1
5
5
12
120
24
12
22
99
12
32
20
22
A
40
80
12
8
A
40
48
20
1
100
3
7
A
40
32
48
14
12
3
12
4 × 10 =A
11 × 9 =M
1 × 1 =O
2 × 6 =E
10 × 8 =K
12 × 10 =R
7 × 2 =C
12 × 4 =S
2 × 12 =H
2 × 10 =F
1 × 7 =D
4 × 2 =W
3 × 1 =N
10 × 10 =U
5 × 1 =P
4 × 8 =T
11 × 2 =L
0/17 letters found
Clue 5
Division facts (1-12) — the last clue
Pilot Cosmo split energy batteries evenly among the shuttle bays.
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
90 ÷ 9 = ?
6 ÷ 2 = ?
16 ÷ 8 = ?
32 ÷ 4 = ?
54 ÷ 9 = ?
12 ÷ 12 = ?
11 ÷ 1 = ?
50 ÷ 10 = ?
132 ÷ 11 = ?
77 ÷ 11 = ?
4 ÷ 1 = ?
Step 2 — cross out the sentence with each answer
1.The villain marched past security with gravity boots, then flashed the area with starlight ray.
2.The villain marched past security with gravity boots, then sliced the lock with laser cutter.
3.The villain blasted off with plasma booster, then scouted the room with nebula scope.
4.The villain zoomed through corridors with ion jetpack, then scanned doors with comet radar.
5.The villain zoomed through corridors with ion jetpack, then deflected alarms with meteor shield.
6.The villain zoomed through corridors with ion jetpack, then flashed the area with starlight ray.
7.The villain glided across the deck with solar skates, then deflected alarms with meteor shield.
8.The villain blasted off with plasma booster, then sliced the lock with laser cutter.
9.The villain blasted off with plasma booster, then scanned doors with comet radar.
10.The villain glided across the deck with solar skates, then scanned doors with comet radar.
11.The villain blasted off with plasma booster, then flashed the area with starlight ray.
12.The villain zoomed through corridors with ion jetpack, then sliced the lock with laser cutter.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Great Lunar Crystal Heist
Culprit: Nova Star (Plasma Booster · Comet Radar · Left Handed · Copper Helmet · Magnetic Trap)
- Clue 1 (Rounding): "THE SUSPECT DOES NOT USE A STARLIGHT RAY"Round 27 to the nearest ten = 30 (T) · Round 80 to the nearest ten = 80 (P) · Round 600 to the nearest hundred = 600 (S) · Round 780 to the nearest hundred = 800 (E) · Round 4,543 to the nearest thousand = 5000 (C) · Round 238 to the nearest hundred = 200 (L) · Round 4,175 to the nearest thousand = 4000 (R) · Round 464 to the nearest hundred = 500 (Y) · Round 87 to the nearest ten = 90 (I) · Round 282 to the nearest hundred = 300 (U) · Round 72 to the nearest ten = 70 (D) · Round 7,716 to the nearest thousand = 8000 (A) · Round 937 to the nearest hundred = 900 (N) · Round 3,037 to the nearest thousand = 3000 (H) · Round 712 to the nearest hundred = 700 (O) · Round 5,798 to the nearest thousand = 6000 (G)
- Clue 2 (Addition): "WITNESS SAW A LEFT HANDED VILLAIN LEAVE"592 + 342 = 934 (W) · 161 + 347 = 508 (E) · 416 + 187 = 603 (S) · 402 + 239 = 641 (D) · 585 + 343 = 928 (I) · 337 + 154 = 491 (T) · 410 + 227 = 637 (H) · 322 + 259 = 581 (N) · 119 + 265 = 384 (V) · 349 + 429 = 778 (L) · 223 + 257 = 480 (A) · 385 + 420 = 805 (F)
- Clue 3 (Subtraction): "THE VILLAIN WAS STOPPED BY A MAGNETIC TRAP"1128 - 326 = 802 (T) · 1170 - 369 = 801 (M) · 733 - 266 = 467 (Y) · 818 - 397 = 421 (D) · 417 - 128 = 289 (W) · 1027 - 342 = 685 (V) · 592 - 186 = 406 (I) · 949 - 60 = 889 (A) · 1234 - 339 = 895 (O) · 599 - 9 = 590 (R) · 1078 - 303 = 775 (B) · 772 - 172 = 600 (E) · 921 - 227 = 694 (H) · 559 - 307 = 252 (P) · 529 - 51 = 478 (S) · 621 - 22 = 599 (N) · 1035 - 387 = 648 (C) · 283 - 126 = 157 (L) · 492 - 277 = 215 (G)
- Clue 4 (Multiplication facts (1-12)): "A COPPER HELMET FLAKE WAS FOUND AT SCENE"4 × 10 = 40 (A) · 11 × 9 = 99 (M) · 1 × 1 = 1 (O) · 2 × 6 = 12 (E) · 10 × 8 = 80 (K) · 12 × 10 = 120 (R) · 7 × 2 = 14 (C) · 12 × 4 = 48 (S) · 2 × 12 = 24 (H) · 2 × 10 = 20 (F) · 1 × 7 = 7 (D) · 4 × 2 = 8 (W) · 3 × 1 = 3 (N) · 10 × 10 = 100 (U) · 5 × 1 = 5 (P) · 4 × 8 = 32 (T) · 11 × 2 = 22 (L)
- Clue 5 (Division facts (1-12)): surviving statement (box 9) → Nova Star90 ÷ 9 = 10 · 6 ÷ 2 = 3 · 16 ÷ 8 = 2 · 32 ÷ 4 = 8 · 54 ÷ 9 = 6 · 12 ÷ 12 = 1 · 11 ÷ 1 = 11 · 50 ÷ 10 = 5 · 132 ÷ 11 = 12 · 77 ÷ 11 = 7 · 4 ÷ 1 = 4
About this mystery
- Grade level
- Grade 3 math
- Math topics
- Rounding, Addition, Subtraction, Multiplication, Division
- Reading level
- grades 3-4
- Theme
- The Great Lunar Crystal Heist — set in Astro Base Alpha
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects