🚀 SpaceGrade 1Reading: grades 1-2AdditionSubtractionMultiplicationSkip countingMissing addends
The Great Space Station Mystery
Oh no! A sneaky Space Bandit snuck onto the Starlight Space Station and hid the Chief Astronomer's shiny star crystal! Help the Space Crew solve the clues and find out who did 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 | Suit Gear | Gadget | Glove Hand | Helmet Stripe | Space Trap |
|---|---|---|---|---|---|
| Jessica | Grapple Hook | Moon Scope | Left Handed | Bright Blue | Dust Spray |
| Eileen | Radar Dish | Solar Battery | Left Handed | Neon Red | Dust Spray |
| Sian | Jetpack | Radio Beam | Left Handed | Bright Blue | Squeaky Toy |
| Peggy | Magnetic Boots | Radio Beam | Right Handed | Silver Glow | Dust Spray |
| Kjell | Magnetic Boots | Space Net | Right Handed | Bright Blue | Squeaky Toy |
| Yuri | Laser Torch | Moon Scope | Left Handed | Bright Blue | Squeaky Toy |
| Guy | Laser Torch | Solar Battery | Left Handed | Bright Blue | Dust Spray |
| Sally | Grapple Hook | Moon Scope | Left Handed | Bright Blue | Squeaky Toy |
| Chris | Laser Torch | Solar Battery | Right Handed | Bright Blue | Squeaky Toy |
| Raja | Magnetic Boots | Star Map | Right Handed | Bright Blue | Dust Spray |
| Christina | Magnetic Boots | Star Map | Right Handed | Silver Glow | Squeaky Toy |
| Bernard | Grapple Hook | Star Map | Right Handed | Bright Blue | Squeaky Toy |
| Valentina | Grapple Hook | Solar Battery | Right Handed | Bright Blue | Flashlight |
| Anousheh | Radar Dish | Star Map | Right Handed | Bright Blue | Squeaky Toy |
| Kalpana | Radar Dish | Moon Scope | Right Handed | Neon Red | Squeaky Toy |
| Guion | Jetpack | Solar Battery | Left Handed | Bright Blue | Flashlight |
| Buzz | Grapple Hook | Radio Beam | Right Handed | Neon Red | Squeaky Toy |
| Alan | Magnetic Boots | Moon Scope | Right Handed | Silver Glow | Squeaky Toy |
| Neil | Grapple Hook | Radio Beam | Right Handed | Bright Blue | Squeaky Toy |
| Victor | Grapple Hook | Solar Battery | Left Handed | Neon Red | Dust Spray |
| Mae | Magnetic Boots | Solar Battery | Left Handed | Neon Red | Squeaky Toy |
Clue 1
Addition
We found star stickers dropped on the floor. Count all the stars together to find the first clue.
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
11
5
7
13
10
16
8
17
T
11
8
12
7
20
16
12
T
11
9
10
4
4
14
10
20
12
2
10
4
13
10
T
11
T
11
7
4
14
5 + 6 =T
3 + 7 =A
1 + 1 =L
10 + 7 =I
4 + 1 =H
9 + 7 =N
2 + 7 =C
12 + 8 =S
4 + 3 =E
6 + 2 =D
9 + 5 =Y
8 + 4 =O
2 + 2 =R
5 + 8 =B
0/14 letters found
Clue 2
Subtraction
Some space rocks were taken from the lab table. Take away the missing rocks to unlock this note.
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
18
10
2
4
11
8
10
T
18
10
6
9
5
2
5
8
19
3
17
2
14
6
1
19
2
16
T
18
13
19
2
6
9
19 - 1 =T
14 - 1 =C
18 - 2 =F
12 - 8 =R
13 - 7 =A
3 - 1 =E
20 - 1 =L
15 - 4 =I
10 - 5 =D
19 - 2 =V
4 - 3 =S
11 - 1 =H
20 - 6 =W
12 - 9 =O
14 - 5 =N
16 - 8 =G
0/16 letters found
Clue 3
Multiplication facts (1-12)
The space station has equal rows of moon boots. Multiply the rows to read the log.
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
144
8
36
44
7
21
5
44
35
A
144
22
30
56
36
30
21
6
A
144
10
35
7
56
11
35
4
A
144
66
7
55
56
A
144
14
A
144
30
12 × 12 =A
5 × 11 =I
3 × 7 =S
7 × 5 =E
5 × 1 =Q
4 × 2 =L
7 × 1 =D
6 × 5 =Y
2 × 5 =R
12 × 3 =O
1 × 6 =C
1 × 11 =H
11 × 6 =N
11 × 4 =U
11 × 2 =K
4 × 1 =B
7 × 8 =T
2 × 7 =W
0/18 letters found
Clue 4
Skip counting
We count energy pods by twos down the hallway. Skip count to catch up to the bandit.
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
26
45
33
60
70
20
65
45
10
35
42
25
65
33
60
30
42
15
A
26
25
25
42
42
16
9
16
120
A
26
6
42
33
A
26
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30A
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48E
Skip-count by 5s. Fill the blank: 5, 10, ___, 20, 25W
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, ___, 30, 35S
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45U
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20N
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, ___, 35, 40P
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, ___, 70, 80I
Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15O
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14L
Skip-count by 2s. Fill the blank: 2, 4, ___, 8, 10M
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140C
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55B
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75T
Skip-count by 5s. Fill the blank: 5, 10, 15, ___, 25, 30H
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39R
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, ___, 80, 90G
0/17 letters found
Clue 5
Missing addends — the last clue
The computer needs ten fuel cells but only has six. Find how many more are needed to open the door.
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
7 + ___ = 10
4 + ___ = 9
3 + ___ = 7
8 + ___ = 9
7 + ___ = 19
8 + ___ = 10
7 + ___ = 17
1 + ___ = 12
3 + ___ = 11
10 + ___ = 16
10 + ___ = 19
Step 2 — cross out the sentence with each answer
1.The villain used a grapple hook, then drained a solar battery.
2.The villain flew with a jetpack, then drained a solar battery.
3.The villain used a grapple hook, then beamed a radio beam.
4.The villain scouted with a radar dish, then stole a star map.
5.The villain used a grapple hook, then stole a star map.
6.The villain scouted with a radar dish, then threw a space net.
7.The villain walked using magnetic boots, then threw a space net.
8.The villain scouted with a radar dish, then beamed a radio beam.
9.The villain cut through with a laser torch, then stole a star map.
10.The villain scouted with a radar dish, then grabbed a moon scope.
11.The villain flew with a jetpack, then threw a space net.
12.The villain scouted with a radar dish, then drained a solar battery.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Great Space Station Mystery
Culprit: Kjell (Magnetic Boots · Space Net · Right Handed · Bright Blue · Squeaky Toy)
- Clue 1 (Addition): "THE BANDIT DOES NOT CARRY A SOLAR BATTERY"5 + 6 = 11 (T) · 3 + 7 = 10 (A) · 1 + 1 = 2 (L) · 10 + 7 = 17 (I) · 4 + 1 = 5 (H) · 9 + 7 = 16 (N) · 2 + 7 = 9 (C) · 12 + 8 = 20 (S) · 4 + 3 = 7 (E) · 6 + 2 = 8 (D) · 9 + 5 = 14 (Y) · 8 + 4 = 12 (O) · 2 + 2 = 4 (R) · 5 + 8 = 13 (B)
- Clue 2 (Subtraction): "THE RIGHT HANDED GLOVE WAS LEFT CLEAN"19 - 1 = 18 (T) · 14 - 1 = 13 (C) · 18 - 2 = 16 (F) · 12 - 8 = 4 (R) · 13 - 7 = 6 (A) · 3 - 1 = 2 (E) · 20 - 1 = 19 (L) · 15 - 4 = 11 (I) · 10 - 5 = 5 (D) · 19 - 2 = 17 (V) · 4 - 3 = 1 (S) · 11 - 1 = 10 (H) · 20 - 6 = 14 (W) · 12 - 9 = 3 (O) · 14 - 5 = 9 (N) · 16 - 8 = 8 (G)
- Clue 3 (Multiplication facts (1-12)): "A LOUD SQUEAKY TOY SCARED THE BANDIT AWAY"12 × 12 = 144 (A) · 5 × 11 = 55 (I) · 3 × 7 = 21 (S) · 7 × 5 = 35 (E) · 5 × 1 = 5 (Q) · 4 × 2 = 8 (L) · 7 × 1 = 7 (D) · 6 × 5 = 30 (Y) · 2 × 5 = 10 (R) · 12 × 3 = 36 (O) · 1 × 6 = 6 (C) · 1 × 11 = 11 (H) · 11 × 6 = 66 (N) · 11 × 4 = 44 (U) · 11 × 2 = 22 (K) · 4 × 1 = 4 (B) · 7 × 8 = 56 (T) · 2 × 7 = 14 (W)
- Clue 4 (Skip counting): "A BRIGHT BLUE STRIPE WAS SEEN ON CAMERA"Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30 = 26 (A) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48 = 42 (E) · Skip-count by 5s. Fill the blank: 5, 10, ___, 20, 25 = 15 (W) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, ___, 30, 35 = 25 (S) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45 = 35 (U) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20 = 16 (N) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, ___, 35, 40 = 30 (P) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, ___, 70, 80 = 60 (I) · Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15 = 9 (O) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14 = 10 (L) · Skip-count by 2s. Fill the blank: 2, 4, ___, 8, 10 = 6 (M) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140 = 120 (C) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55 = 45 (B) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75 = 65 (T) · Skip-count by 5s. Fill the blank: 5, 10, 15, ___, 25, 30 = 20 (H) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39 = 33 (R) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, ___, 80, 90 = 70 (G)
- Clue 5 (Missing addends): surviving statement (box 7) → Kjell7 + ___ = 10 = 3 · 4 + ___ = 9 = 5 · 3 + ___ = 7 = 4 · 8 + ___ = 9 = 1 · 7 + ___ = 19 = 12 · 8 + ___ = 10 = 2 · 7 + ___ = 17 = 10 · 1 + ___ = 12 = 11 · 3 + ___ = 11 = 8 · 10 + ___ = 16 = 6 · 10 + ___ = 19 = 9
About this mystery
- Grade level
- Grade 1 math
- Math topics
- Addition, Subtraction, Multiplication, Skip counting, Missing addends
- Reading level
- grades 1-2
- Theme
- The Great Space Station Mystery — set in Starlight Space Station
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects