🚀 SpaceGrade 4Reading: grades 3-4RoundingBar modelsAdditionSubtractionDivision
The Astro Delta Heist
The glowing Star-Core has been stolen from the central reactor! The station alarms are blaring, and the villain is trying to escape into the deep cosmos. You must look at the crew logs and solve the clues to find the bandit before they warp away.
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 | Suit Power | Ship Upgrade | Dominant Hand | Visor Dye Color | Engine Hazard |
|---|---|---|---|---|---|
| Neil Armstrong | Rocket Pack | Warp Engine | Right Handed | Comet Silver | Solar Flares |
| Ed White | Laser Blaster | Warp Engine | Left Handed | Comet Silver | Solar Flares |
| Ellen Ochoa | Laser Blaster | Freeze Ray | Right Handed | Nebula Purple | Space Dust |
| Mae Jemison | Plasma Shield | Cyber Drone | Left Handed | Comet Silver | Space Dust |
| Sunita Williams | Gravity Boots | Warp Engine | Left Handed | Asteroid Grey | Moon Water |
| Chris Hadfield | Tractor Beam | Magnetic Glove | Left Handed | Comet Silver | Space Dust |
| Bill Anders | Laser Blaster | Freeze Ray | Right Handed | Comet Silver | Moon Water |
| Fred Haise | Rocket Pack | Solar Sails | Right Handed | Comet Silver | Solar Flares |
| Peggy Whitson | Gravity Boots | Magnetic Glove | Right Handed | Asteroid Grey | Solar Flares |
| Gene Cernan | Laser Blaster | Warp Engine | Left Handed | Nebula Purple | Solar Flares |
| Roger Chaffee | Laser Blaster | Solar Sails | Left Handed | Nebula Purple | Solar Flares |
| Sally Ride | Plasma Shield | Solar Sails | Right Handed | Asteroid Grey | Space Dust |
| Pete Conrad | Gravity Boots | Solar Sails | Right Handed | Comet Silver | Solar Flares |
| Yuri Gagarin | Rocket Pack | Freeze Ray | Left Handed | Comet Silver | Solar Flares |
| Alan Shepard | Rocket Pack | Solar Sails | Right Handed | Comet Silver | Moon Water |
| Jack Swigert | Plasma Shield | Freeze Ray | Left Handed | Comet Silver | Solar Flares |
| Guy Bluford | Tractor Beam | Solar Sails | Left Handed | Comet Silver | Solar Flares |
| James Lovell | Laser Blaster | Magnetic Glove | Right Handed | Nebula Purple | Space Dust |
| Gus Grissom | Gravity Boots | Magnetic Glove | Left Handed | Comet Silver | Solar Flares |
| Michael Collins | Laser Blaster | Solar Sails | Left Handed | Nebula Purple | Moon Water |
| John Glenn | Rocket Pack | Cyber Drone | Left Handed | Asteroid Grey | Solar Flares |
Clue 1
Rounding
We check the cargo manifests. The computer drew bar models to compare the weight of each astronaut's space gear.
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
130
110
20
430
30
370
2000
700
T
130
2000
170
20
3000
370
170
T
130
2300
3000
20
30
290
30
70
370
20
T
130
700
3700
70
900
170
50
20
Round 132 to the nearest tenT
Round 885 to the nearest hundredL
Round 29 to the nearest tenA
Round 20 to the nearest tenE
Round 720 to the nearest hundredI
Round 2,419 to the nearest thousandD
Round 290 to the nearest tenM
Round 106 to the nearest tenH
Round 69 to the nearest tenG
Round 3,705 to the nearest hundredC
Round 433 to the nearest tenB
Round 52 to the nearest tenV
Round 166 to the nearest tenO
Round 2,343 to the nearest hundredU
Round 3,122 to the nearest thousandS
Round 370 to the nearest tenN
0/16 letters found
Clue 2
Bar models
The ship radar is glitchy. It only shows launch speeds rounded to the nearest ten. Let us round the speeds to decode the hint.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Awitnesssawthevillainwas .
L
57
26
50
46
7
8
41
D
26
D
68
11
?
54
4
?
28
2
?
4
3
?
53
7
?
19
11
?
58
17
?
0/7 letters found
Clue 3
Addition
We find a logbook with fuel cell totals. Adding the cells used on each flight path reveals who is next.
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
5567
5704
6200
5532
9044
6024
6200
5532
9044
6835
S
5567
9357
5704
7419
6835
9044
5376
5704
7419
3806
7989
4728
6835
3359
5532
3806
5376
9447
7989
S
5567
4778
9447
7989
3356 + 2211 =S
2678 + 5311 =T
3194 + 2338 =A
3677 + 2027 =O
4252 + 1948 =L
2972 + 1806 =U
1126 + 2233 =B
3189 + 1539 =H
2122 + 1684 =N
3341 + 2683 =F
5894 + 3463 =P
3680 + 5767 =I
3701 + 3134 =E
1718 + 3658 =D
5799 + 3245 =R
4240 + 3179 =W
0/16 letters found
Clue 4
Subtraction
The oxygen tanks are leaking. Subtracting the bad air from the total shows exactly how long they stayed.
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
3874
4101
5065
5096
4878
7480
1141
5705
5096
1746
4101
4525
6639
5825
1698
1829
4101
2661
6639
4525
2661
1667
7480
1141
6639
5825
7480
4525
6669
4101
5705
5096
5705
7814
5996
5825
4525
7688 - 3814 =W
3177 - 516 =R
3586 - 1840 =M
2100 - 271 =V
8872 - 2233 =S
6582 - 586 =P
5490 - 965 =T
7071 - 2006 =F
3110 - 1412 =L
4134 - 2467 =A
11715 - 4235 =N
7986 - 1317 =H
7415 - 2537 =U
9174 - 1360 =K
4706 - 3565 =D
10005 - 4300 =C
6797 - 2696 =E
9686 - 3861 =I
5884 - 788 =O
0/19 letters found
Clue 5
Division facts (1-12) — the last clue
We need to split the leftover satellite dishes. Dividing them equally among the launch pads gives us 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
20 ÷ 5 = ?
54 ÷ 6 = ?
22 ÷ 11 = ?
7 ÷ 7 = ?
12 ÷ 1 = ?
50 ÷ 10 = ?
120 ÷ 12 = ?
18 ÷ 3 = ?
15 ÷ 5 = ?
66 ÷ 6 = ?
24 ÷ 3 = ?
Step 2 — cross out the sentence with each answer
1.The villain activates gravity boots, then deploys a cyber drone.
2.The villain fires a tractor beam, then unfurls solar sails.
3.The villain fires a tractor beam, then engages a warp engine.
4.The villain raises a plasma shield, then shoots a freeze ray.
5.The villain fires a laser blaster, then deploys a cyber drone.
6.The villain activates gravity boots, then engages a warp engine.
7.The villain fires a laser blaster, then engages a warp engine.
8.The villain fires a tractor beam, then deploys a cyber drone.
9.The villain ignites a rocket pack, then shoots a freeze ray.
10.The villain fires a laser blaster, then powers up a magnetic glove.
11.The villain ignites a rocket pack, then unfurls solar sails.
12.The villain activates gravity boots, then powers up a magnetic glove.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Astro Delta Heist
Culprit: Ed White (Laser Blaster · Warp Engine · Left Handed · Comet Silver · Solar Flares)
- Clue 1 (Rounding): "THE BANDIT DOES NOT USE A MAGNETIC GLOVE"Round 132 to the nearest ten = 130 (T) · Round 885 to the nearest hundred = 900 (L) · Round 29 to the nearest ten = 30 (A) · Round 20 to the nearest ten = 20 (E) · Round 720 to the nearest hundred = 700 (I) · Round 2,419 to the nearest thousand = 2000 (D) · Round 290 to the nearest ten = 290 (M) · Round 106 to the nearest ten = 110 (H) · Round 69 to the nearest ten = 70 (G) · Round 3,705 to the nearest hundred = 3700 (C) · Round 433 to the nearest ten = 430 (B) · Round 52 to the nearest ten = 50 (V) · Round 166 to the nearest ten = 170 (O) · Round 2,343 to the nearest hundred = 2300 (U) · Round 3,122 to the nearest thousand = 3000 (S) · Round 370 to the nearest ten = 370 (N)
- Clue 2 (Bar models): "LEFT HANDED"The whole is 68. One part is 11. What is the other part? = 57 (L) · The whole is 54. One part is 4. What is the other part? = 50 (F) · One bar shows 28 and the other shows 2. How much longer is the first bar? = 26 (E) · One part is 4 and the other part is 3. What is the whole? = 7 (H) · One bar shows 53 and the other shows 7. How much longer is the first bar? = 46 (T) · One bar shows 19 and the other shows 11. How much longer is the first bar? = 8 (A) · The whole is 58. One part is 17. What is the other part? = 41 (N)
- Clue 3 (Addition): "SOLAR FLARES POWER DOWN THE BANDIT SUIT"3356 + 2211 = 5567 (S) · 2678 + 5311 = 7989 (T) · 3194 + 2338 = 5532 (A) · 3677 + 2027 = 5704 (O) · 4252 + 1948 = 6200 (L) · 2972 + 1806 = 4778 (U) · 1126 + 2233 = 3359 (B) · 3189 + 1539 = 4728 (H) · 2122 + 1684 = 3806 (N) · 3341 + 2683 = 6024 (F) · 5894 + 3463 = 9357 (P) · 3680 + 5767 = 9447 (I) · 3701 + 3134 = 6835 (E) · 1718 + 3658 = 5376 (D) · 5799 + 3245 = 9044 (R) · 4240 + 3179 = 7419 (W)
- Clue 4 (Subtraction): "WE FOUND COMET SILVER STRANDS IN THE COCKPIT"7688 - 3814 = 3874 (W) · 3177 - 516 = 2661 (R) · 3586 - 1840 = 1746 (M) · 2100 - 271 = 1829 (V) · 8872 - 2233 = 6639 (S) · 6582 - 586 = 5996 (P) · 5490 - 965 = 4525 (T) · 7071 - 2006 = 5065 (F) · 3110 - 1412 = 1698 (L) · 4134 - 2467 = 1667 (A) · 11715 - 4235 = 7480 (N) · 7986 - 1317 = 6669 (H) · 7415 - 2537 = 4878 (U) · 9174 - 1360 = 7814 (K) · 4706 - 3565 = 1141 (D) · 10005 - 4300 = 5705 (C) · 6797 - 2696 = 4101 (E) · 9686 - 3861 = 5825 (I) · 5884 - 788 = 5096 (O)
- Clue 5 (Division facts (1-12)): surviving statement (box 7) → Ed White20 ÷ 5 = 4 · 54 ÷ 6 = 9 · 22 ÷ 11 = 2 · 7 ÷ 7 = 1 · 12 ÷ 1 = 12 · 50 ÷ 10 = 5 · 120 ÷ 12 = 10 · 18 ÷ 3 = 6 · 15 ÷ 5 = 3 · 66 ÷ 6 = 11 · 24 ÷ 3 = 8
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Rounding, Bar models, Addition, Subtraction, Division
- Reading level
- grades 3-4
- Theme
- The Astro Delta Heist — set in Astro Delta Station
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects