🚀 SpaceGrade 4Reading: grades 3-4RoundingAdditionSubtractionMultiplicationDivision
Case of the Comet Thief
Last night someone snuck aboard Orbit-9 and stole Captain Vega right out of the control room. The alarms never beeped, and the only clue left behind was a trail of frozen comet dust. It's up to you, junior detective, to track down the Comet Thief before their ship jumps 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 | Ship Type | Gadget | Pilot Type | Hull Color | Weakness |
|---|---|---|---|---|---|
| Polaris Kim | saucer scout | laser drill | robot pilot | silver hull | bright flashlights |
| Mira Stone | ice runner | laser drill | robot pilot | red hull | loud alarms |
| Jett Solis | saucer scout | laser drill | robot pilot | green hull | sticky foam |
| Pilot Zara | cargo hauler | star map | human pilot | silver hull | loud alarms |
| Quill Ramos | ice runner | laser drill | robot pilot | silver hull | bright flashlights |
| Dusty Reyes | stealth glider | laser drill | human pilot | silver hull | bright flashlights |
| Nebula Joy | rocket cruiser | cloaking field | robot pilot | red hull | sticky foam |
| Major Orion | cargo hauler | gravity boots | robot pilot | silver hull | sticky foam |
| Cosmo Dale | ice runner | gravity boots | human pilot | red hull | sticky foam |
| Captain Nova | cargo hauler | cloaking field | human pilot | red hull | sticky foam |
| Luna Park | cargo hauler | gravity boots | robot pilot | red hull | loud alarms |
| Echo Vance | saucer scout | star map | robot pilot | green hull | loud alarms |
| Rocket Tam | stealth glider | laser drill | robot pilot | red hull | bright flashlights |
| Commander Rex | rocket cruiser | laser drill | robot pilot | green hull | bright flashlights |
| Astra Hale | ice runner | cloaking field | human pilot | silver hull | sticky foam |
| Sky Bellow | stealth glider | cloaking field | robot pilot | silver hull | bright flashlights |
| Finn Glow | saucer scout | gravity boots | robot pilot | red hull | bright flashlights |
| Vega Lin | cargo hauler | star map | robot pilot | silver hull | bright flashlights |
| Stella Pax | cargo hauler | cloaking field | robot pilot | silver hull | sticky foam |
| Comet Cole | stealth glider | laser drill | human pilot | red hull | bright flashlights |
| Buzz Calder | saucer scout | tractor beam | robot pilot | silver hull | bright flashlights |
Clue 1
Rounding
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
310000
700000
2800000
50
70000
4700000
4700000
5000
70000
28000
2000
5000
28000
28000
7000
T
310000
500000
470
2800000
5000
2000
4700000
7000
5000
500
70000
28000
280000
50000
70000
2800000
4700000
2800
Round 309,260 to the nearest ten thousandT
Round 51 to the nearest tenV
Round 5,257 to the nearest thousandA
Round 462 to the nearest hundredK
Round 714,258 to the nearest hundred thousandH
Round 6,978 to the nearest thousandO
Round 66,525 to the nearest ten thousandI
Round 4,675,985 to the nearest hundred thousandL
Round 2,838 to the nearest hundredD
Round 28,135 to the nearest thousandN
Round 2,766,546 to the nearest hundred thousandE
Round 46,542 to the nearest ten thousandF
Round 2,331 to the nearest thousandC
Round 526,718 to the nearest hundred thousandU
Round 468 to the nearest tenS
Round 277,923 to the nearest ten thousandG
0/16 letters found
Clue 2
Addition
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
4034
3111
2928
A
4034
7692
2728
4219
A
4034
8256
A
4034
7692
9039
7863
9039
7260
5783
3508
6177
9039
7260
7692
2928
5272
9039
4458
4458
1287 + 2747 =A
5221 + 2471 =R
1138 + 1790 =U
2714 + 3069 =P
1513 + 1995 =I
3453 + 4803 =W
1743 + 985 =D
3759 + 5280 =O
3827 + 2350 =L
5109 + 2754 =B
1923 + 2296 =S
2132 + 979 =G
2816 + 2456 =N
2614 + 1844 =F
3865 + 3395 =T
0/15 letters found
Clue 3
Subtraction
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
6610
7004
8180
7597
3925
7275
7623
4062
5711
A
6610
5129
7275
5711
7597
3925
7275
7623
2681
A
6610
1300
7015
7623
7275
7015
7623
7275
7597
7015
4062
4062
5711
7015
7015
8040 - 1430 =A
8827 - 4765 =F
9653 - 2030 =T
6682 - 2757 =G
5107 - 2426 =M
8622 - 442 =R
8586 - 989 =I
10051 - 4922 =S
2319 - 1019 =D
9070 - 3359 =L
10044 - 2769 =H
9611 - 2607 =B
8512 - 1497 =E
0/13 letters found
Clue 4
Multiplication facts (1–12)
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
21
144
60
9
88
81
110
108
144
24
44
12
70
144
110
S
21
50
88
81
88
60
88
40
44
25
88
70
144
24
36
3 × 7 =S
12 × 12 =I
6 × 6 =D
12 × 9 =A
11 × 4 =T
5 × 5 =B
9 × 9 =R
8 × 5 =F
8 × 11 =E
4 × 6 =N
11 × 10 =P
10 × 5 =W
9 × 1 =V
3 × 4 =C
5 × 12 =L
7 × 10 =H
0/16 letters found
Clue 5
Division facts (1–12) — the last clue
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
42 ÷ 7 = ?
50 ÷ 10 = ?
99 ÷ 9 = ?
12 ÷ 6 = ?
40 ÷ 10 = ?
15 ÷ 5 = ?
110 ÷ 11 = ?
45 ÷ 5 = ?
80 ÷ 10 = ?
5 ÷ 5 = ?
132 ÷ 11 = ?
Step 2 — cross out the sentence with each answer
1.The villain rolls up in a cargo hauler, then grabs the captain with a tractor beam.
2.The villain sneaks up in a stealth glider, then plots an escape with a star map.
3.The villain drifts down in a saucer scout, then plots an escape with a star map.
4.The villain blasts in on a rocket cruiser, then vanishes behind a cloaking field.
5.The villain drifts down in a saucer scout, then grabs the captain with a tractor beam.
6.The villain slides in on an ice runner, then cuts the hatch with a laser drill.
7.The villain drifts down in a saucer scout, then cuts the hatch with a laser drill.
8.The villain sneaks up in a stealth glider, then grabs the captain with a tractor beam.
9.The villain blasts in on a rocket cruiser, then grabs the captain with a tractor beam.
10.The villain blasts in on a rocket cruiser, then plots an escape with a star map.
11.The villain rolls up in a cargo hauler, then plots an escape with a star map.
12.The villain rolls up in a cargo hauler, then vanishes behind a cloaking field.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — Case of the Comet Thief
Culprit: Polaris Kim (saucer scout · laser drill · robot pilot · silver hull · bright flashlights)
- Clue 1 (Rounding): "THE VILLAIN CANNOT USE A CLOAKING FIELD"Round 309,260 to the nearest ten thousand = 310000 (T) · Round 51 to the nearest ten = 50 (V) · Round 5,257 to the nearest thousand = 5000 (A) · Round 462 to the nearest hundred = 500 (K) · Round 714,258 to the nearest hundred thousand = 700000 (H) · Round 6,978 to the nearest thousand = 7000 (O) · Round 66,525 to the nearest ten thousand = 70000 (I) · Round 4,675,985 to the nearest hundred thousand = 4700000 (L) · Round 2,838 to the nearest hundred = 2800 (D) · Round 28,135 to the nearest thousand = 28000 (N) · Round 2,766,546 to the nearest hundred thousand = 2800000 (E) · Round 46,542 to the nearest ten thousand = 50000 (F) · Round 2,331 to the nearest thousand = 2000 (C) · Round 526,718 to the nearest hundred thousand = 500000 (U) · Round 468 to the nearest ten = 470 (S) · Round 277,923 to the nearest ten thousand = 280000 (G)
- Clue 2 (Addition): "A GUARD SAW A ROBOT PILOT RUN OFF"1287 + 2747 = 4034 (A) · 5221 + 2471 = 7692 (R) · 1138 + 1790 = 2928 (U) · 2714 + 3069 = 5783 (P) · 1513 + 1995 = 3508 (I) · 3453 + 4803 = 8256 (W) · 1743 + 985 = 2728 (D) · 3759 + 5280 = 9039 (O) · 3827 + 2350 = 6177 (L) · 5109 + 2754 = 7863 (B) · 1923 + 2296 = 4219 (S) · 2132 + 979 = 3111 (G) · 2816 + 2456 = 5272 (N) · 2614 + 1844 = 4458 (F) · 3865 + 3395 = 7260 (T)
- Clue 3 (Subtraction): "A BRIGHT FLASHLIGHT MADE THE THIEF FLEE"8040 - 1430 = 6610 (A) · 8827 - 4765 = 4062 (F) · 9653 - 2030 = 7623 (T) · 6682 - 2757 = 3925 (G) · 5107 - 2426 = 2681 (M) · 8622 - 442 = 8180 (R) · 8586 - 989 = 7597 (I) · 10051 - 4922 = 5129 (S) · 2319 - 1019 = 1300 (D) · 9070 - 3359 = 5711 (L) · 10044 - 2769 = 7275 (H) · 9611 - 2607 = 7004 (B) · 8512 - 1497 = 7015 (E)
- Clue 4 (Multiplication facts (1–12)): "SILVER PAINT CHIPS WERE LEFT BEHIND"3 × 7 = 21 (S) · 12 × 12 = 144 (I) · 6 × 6 = 36 (D) · 12 × 9 = 108 (A) · 11 × 4 = 44 (T) · 5 × 5 = 25 (B) · 9 × 9 = 81 (R) · 8 × 5 = 40 (F) · 8 × 11 = 88 (E) · 4 × 6 = 24 (N) · 11 × 10 = 110 (P) · 10 × 5 = 50 (W) · 9 × 1 = 9 (V) · 3 × 4 = 12 (C) · 5 × 12 = 60 (L) · 7 × 10 = 70 (H)
- Clue 5 (Division facts (1–12)): surviving statement (box 7) → Polaris Kim42 ÷ 7 = 6 · 50 ÷ 10 = 5 · 99 ÷ 9 = 11 · 12 ÷ 6 = 2 · 40 ÷ 10 = 4 · 15 ÷ 5 = 3 · 110 ÷ 11 = 10 · 45 ÷ 5 = 9 · 80 ÷ 10 = 8 · 5 ÷ 5 = 1 · 132 ÷ 11 = 12
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Rounding, Addition, Subtraction, Multiplication, Division
- Reading level
- grades 3-4
- Theme
- Case of the Comet Thief — set in the space station Orbit-9
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects