🚀 SpaceGrade 2Reading: grades 1-2MultiplicationPlace valueAdditionSubtractionMissing addends
The Moon Base Mystery
A sneak stole the moon crystal from Lunar Base Alpha. Examine the clues and eliminate suspects to catch the space bandit.
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 | Gadget | Spacesuit Color | Glove Hand | Helmet Stripe | Space Snack |
|---|---|---|---|---|---|
| John Glenn | Radar Dish | Neon Blue | Right Handed | Gold Stripe | Space Peanuts |
| Mae Jemison | Jet Boots | Solar Yellow | Right Handed | Gold Stripe | Tang Drink Mix |
| Alan Shepard | Laser Pen | Solar Yellow | Right Handed | Red Stripe | Freeze Dried Ice Cream |
| Kalpana Chawla | Laser Pen | Solar Yellow | Right Handed | Gold Stripe | Tang Drink Mix |
| Guion Bluford | Gravity Boots | Cosmic Purple | Right Handed | Red Stripe | Freeze Dried Ice Cream |
| Ed White | Radar Dish | Lime Green | Right Handed | Gold Stripe | Freeze Dried Ice Cream |
| Sunita Williams | Star Map | Lime Green | Left Handed | Red Stripe | Space Peanuts |
| Sally Ride | Laser Pen | Neon Blue | Left Handed | Silver Stripe | Space Peanuts |
| Christina Koch | Radar Dish | Bright Orange | Right Handed | Red Stripe | Freeze Dried Ice Cream |
| Carl Sagan | Star Map | Neon Blue | Left Handed | Gold Stripe | Freeze Dried Ice Cream |
| Jim Lovell | Gravity Boots | Bright Orange | Left Handed | Gold Stripe | Freeze Dried Ice Cream |
| Galileo Galilei | Laser Pen | Bright Orange | Right Handed | Red Stripe | Tang Drink Mix |
| Jessica Meir | Radar Dish | Lime Green | Left Handed | Silver Stripe | Freeze Dried Ice Cream |
| Valentina Tereshkova | Laser Pen | Lime Green | Right Handed | Red Stripe | Freeze Dried Ice Cream |
| Gene Cernan | Radar Dish | Cosmic Purple | Left Handed | Red Stripe | Freeze Dried Ice Cream |
| Peggy Whitson | Star Map | Neon Blue | Left Handed | Silver Stripe | Space Peanuts |
| Ellen Ochoa | Laser Pen | Bright Orange | Left Handed | Silver Stripe | Space Peanuts |
| Neil Armstrong | Gravity Boots | Solar Yellow | Left Handed | Red Stripe | Freeze Dried Ice Cream |
| Michael Collins | Gravity Boots | Cosmic Purple | Right Handed | Silver Stripe | Tang Drink Mix |
| Nicolaus Copernicus | Jet Boots | Lime Green | Left Handed | Silver Stripe | Space Peanuts |
| Buzz Aldrin | Gravity Boots | Lime Green | Right Handed | Red Stripe | Freeze Dried Ice Cream |
Clue 1
Multiplication facts (1-12)
You count equal rows of star crates to unlock the first code.
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
56
120
110
66
27
99
28
30
T
56
28
11
110
20
99
11
T
56
45
110
27
36
20
11
72
27
36
88
110
72
72
11
45
8 × 7 =T
9 × 3 =A
8 × 11 =Y
9 × 11 =N
4 × 7 =D
11 × 1 =O
6 × 11 =B
9 × 5 =W
10 × 11 =E
6 × 12 =L
6 × 5 =I
10 × 2 =S
12 × 3 =R
10 × 12 =H
0/14 letters found
Clue 2
Place value
You read the tens and ones on the space station screen.
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
36
35
15
88
12
75
12
T
36
30
57
12
T
36
T
36
15
54
96
88
69
83
35
T
36
35
96
18
54
15
54
57
69
39
12
T
36
What number has 3 tens and 6 ones?T
What number has 3 tens and 9 ones?L
What number has 8 tens and 3 ones?G
What number has 5 tens and 7 ones?P
What number has 7 tens and 5 ones?B
What number has 8 tens and 8 ones?R
What number has 3 tens and 0 ones?S
What number has 6 tens and 9 ones?I
What number has 1 ten and 2 ones?O
What number has 9 tens and 6 ones?A
What number has 3 tens and 5 ones?H
What number has 1 ten and 8 ones?N
What number has 1 ten and 5 ones?E
What number has 5 tens and 4 ones?D
0/14 letters found
Clue 3
Addition
You add up the moon rocks found on the bay floor.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
D
88
70
56
77
77
39
D
88
60
70
39
39
46
39
D
88
70
57
39
D
88
57
37
39
37
70
39
76
97
71
39
76
70
25
86
54 + 34 =D
28 + 48 =A
42 + 44 =Y
32 + 45 =P
23 + 47 =R
15 + 10 =B
25 + 14 =E
26 + 20 =Z
34 + 26 =F
50 + 21 =N
26 + 30 =O
31 + 26 =I
56 + 41 =M
16 + 21 =C
0/14 letters found
Clue 4
Subtraction
You take away used oxygen tanks from the storage rack.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
F
82
47
24
27
74
77
86
24
52
56
60
52
56
72
77
11
59
74
86
56
11
52
41
59
121 - 39 =F
54 - 30 =U
115 - 38 =A
50 - 23 =N
69 - 17 =I
19 - 8 =R
98 - 38 =W
79 - 5 =D
60 - 19 =P
99 - 40 =E
85 - 13 =H
77 - 21 =T
114 - 28 =S
50 - 3 =O
0/14 letters found
Clue 5
Missing addends — the last clue
You find the missing number on the rocket keypad.
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
6 + ___ = 14
4 + ___ = 9
3 + ___ = 9
1 + ___ = 12
5 + ___ = 8
9 + ___ = 16
1 + ___ = 13
9 + ___ = 18
6 + ___ = 10
4 + ___ = 14
8 + ___ = 10
Step 2 — cross out the sentence with each answer
1.The villain scan the bay with a radar dish, then adjust a bright orange visor.
2.The villain zoom away using jet boots, then adjust a bright orange visor.
3.The villain chart a course with a star map, then seal a cosmic purple coat.
4.The villain scan the bay with a radar dish, then flash a solar yellow helmet.
5.The villain stomp the hatch in gravity boots, then seal a cosmic purple coat.
6.The villain zap the lock with a laser pen, then click a lime green suit.
7.The villain stomp the hatch in gravity boots, then flash a solar yellow helmet.
8.The villain stomp the hatch in gravity boots, then click a lime green suit.
9.The villain scan the bay with a radar dish, then click a lime green suit.
10.The villain zoom away using jet boots, then flash a solar yellow helmet.
11.The villain zap the lock with a laser pen, then adjust a bright orange visor.
12.The villain zoom away using jet boots, then zip up a neon blue suit.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Moon Base Mystery
Culprit: Christina Koch (Radar Dish · Bright Orange · Right Handed · Red Stripe · Freeze Dried Ice Cream)
- Clue 1 (Multiplication facts (1-12)): "THE BANDIT DOES NOT WEAR SOLAR YELLOW"8 × 7 = 56 (T) · 9 × 3 = 27 (A) · 8 × 11 = 88 (Y) · 9 × 11 = 99 (N) · 4 × 7 = 28 (D) · 11 × 1 = 11 (O) · 6 × 11 = 66 (B) · 9 × 5 = 45 (W) · 10 × 11 = 110 (E) · 6 × 12 = 72 (L) · 6 × 5 = 30 (I) · 10 × 2 = 20 (S) · 12 × 3 = 36 (R) · 10 × 12 = 120 (H)
- Clue 2 (Place value): "THE ROBOT SPOTTED A RIGHT HANDED PILOT"What number has 3 tens and 6 ones? = 36 (T) · What number has 3 tens and 9 ones? = 39 (L) · What number has 8 tens and 3 ones? = 83 (G) · What number has 5 tens and 7 ones? = 57 (P) · What number has 7 tens and 5 ones? = 75 (B) · What number has 8 tens and 8 ones? = 88 (R) · What number has 3 tens and 0 ones? = 30 (S) · What number has 6 tens and 9 ones? = 69 (I) · What number has 1 ten and 2 ones? = 12 (O) · What number has 9 tens and 6 ones? = 96 (A) · What number has 3 tens and 5 ones? = 35 (H) · What number has 1 ten and 8 ones? = 18 (N) · What number has 1 ten and 5 ones? = 15 (E) · What number has 5 tens and 4 ones? = 54 (D)
- Clue 3 (Addition): "DROPPED FREEZE DRIED ICE CREAM NEARBY"54 + 34 = 88 (D) · 28 + 48 = 76 (A) · 42 + 44 = 86 (Y) · 32 + 45 = 77 (P) · 23 + 47 = 70 (R) · 15 + 10 = 25 (B) · 25 + 14 = 39 (E) · 26 + 20 = 46 (Z) · 34 + 26 = 60 (F) · 50 + 21 = 71 (N) · 26 + 30 = 56 (O) · 31 + 26 = 57 (I) · 56 + 41 = 97 (M) · 16 + 21 = 37 (C)
- Clue 4 (Subtraction): "FOUND A SUIT WITH A RED STRIPE"121 - 39 = 82 (F) · 54 - 30 = 24 (U) · 115 - 38 = 77 (A) · 50 - 23 = 27 (N) · 69 - 17 = 52 (I) · 19 - 8 = 11 (R) · 98 - 38 = 60 (W) · 79 - 5 = 74 (D) · 60 - 19 = 41 (P) · 99 - 40 = 59 (E) · 85 - 13 = 72 (H) · 77 - 21 = 56 (T) · 114 - 28 = 86 (S) · 50 - 3 = 47 (O)
- Clue 5 (Missing addends): surviving statement (box 1) → Christina Koch6 + ___ = 14 = 8 · 4 + ___ = 9 = 5 · 3 + ___ = 9 = 6 · 1 + ___ = 12 = 11 · 5 + ___ = 8 = 3 · 9 + ___ = 16 = 7 · 1 + ___ = 13 = 12 · 9 + ___ = 18 = 9 · 6 + ___ = 10 = 4 · 4 + ___ = 14 = 10 · 8 + ___ = 10 = 2
About this mystery
- Grade level
- Grade 2 math
- Math topics
- Multiplication, Place value, Addition, Subtraction, Missing addends
- Reading level
- grades 1-2
- Theme
- The Moon Base Mystery — set in Lunar Base Alpha
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects