🚀 SpaceGrade 1Reading: grades 1-2AdditionSubtractionSkip countingPlace valueMissing addends
The Cosmic Cape Caper
A sneaky Astro-Thief took the Golden Star Trophy from the dome! Captain Sally needs your help to track them down before the shuttle blasts off. Let us look for clues!
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 | Astro-Gear | Super-Suit Tool | Lucky Hand | Helmet Glow Color | Fear |
|---|---|---|---|---|---|
| Kalpana | fast rocket pack | bright plasma light | left handed | hot pink glow | bright sunlight |
| Eileen | noisy space scooter | bright plasma light | right handed | bright blue glow | loud space music |
| Pete | fast rocket pack | hot laser tool | left handed | neon green glow | sticky bubble gum |
| Alan | noisy space scooter | glowing radar watch | right handed | hot pink glow | loud space music |
| Buzz | fast rocket pack | bright plasma light | right handed | bright blue glow | loud space music |
| Fred | noisy space scooter | hot laser tool | right handed | hot pink glow | loud space music |
| Jim | fast rocket pack | bright plasma light | left handed | neon green glow | loud space music |
| Valentina | bumpy bubble rover | strong magnet glove | left handed | bright blue glow | sticky bubble gum |
| Sally | bumpy bubble rover | strong magnet glove | right handed | bright blue glow | loud space music |
| Neil | silent star glider | glowing radar watch | right handed | bright blue glow | loud space music |
| Jack | noisy space scooter | strong magnet glove | left handed | bright blue glow | loud space music |
| Guy | fast rocket pack | glowing radar watch | right handed | bright blue glow | sticky bubble gum |
| Ed | bumpy bubble rover | glowing radar watch | left handed | bright blue glow | loud space music |
| Scott | bumpy bubble rover | hot laser tool | right handed | neon green glow | loud space music |
| Michael | silent star glider | glowing radar watch | right handed | bright blue glow | bright sunlight |
| Chris | fast rocket pack | bright plasma light | left handed | bright blue glow | loud space music |
| Yuri | heavy gravity boots | fancy shrink beam | left handed | hot pink glow | bright sunlight |
| Alexei | silent star glider | bright plasma light | left handed | bright blue glow | loud space music |
| Gus | bumpy bubble rover | hot laser tool | right handed | neon green glow | sticky bubble gum |
| Gene | bumpy bubble rover | fancy shrink beam | left handed | bright blue glow | loud space music |
| John | fast rocket pack | fancy shrink beam | right handed | bright blue glow | loud space music |
Clue 1
Addition
We count the star fuel cans. We add two more cans. The total reveals a hint!
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
19
4
15
T
19
4
20
15
2
5
10
15
16
17
10
T
19
13
16
15
T
19
4
15
16
4
3
20
17
18
14
15
8
6
12 + 7 =T
5 + 3 =A
1 + 1 =F
1 + 2 =R
9 + 7 =S
8 + 6 =B
4 + 2 =M
4 + 6 =O
7 + 8 =E
8 + 12 =I
3 + 2 =D
3 + 10 =U
6 + 11 =N
13 + 5 =K
3 + 1 =H
0/15 letters found
Clue 2
Subtraction
The radar screen loses some dots. We subtract the lost dots to read the 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
9
18
14
12
7
13
18
T
9
18
3
6
4
14
4
13
1
2
10
14
8
12
7
6
T
9
15
11
14
12
14
15
14
14
6
15 - 6 =T
8 - 2 =N
17 - 9 =P
18 - 5 =G
10 - 7 =A
8 - 6 =O
18 - 4 =E
20 - 2 =H
13 - 1 =R
15 - 4 =W
8 - 4 =D
11 - 4 =I
4 - 3 =L
16 - 6 =V
17 - 2 =S
0/15 letters found
Clue 3
Skip counting
The rocket lights flash in a pattern of twos. Count by twos to find the 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.
F
40
16
90
18
F
40
55
30
24
16
30
36
18
10
39
130
50
90
24
36
10
15
50
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, ___, 45, 50F
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20L
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150A
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14S
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ___, 42, 45P
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, ___, 33, 36O
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, ___, 60, 70C
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, ___, 20, 22D
Skip-count by 5s. Fill the blank: 5, 10, ___, 20, 25I
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42U
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65R
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110E
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, ___, 26, 28M
0/13 letters found
Clue 4
Place value
We look at the computer screen. It shows tens and ones to unlock the vault!
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
B
99
78
92
37
77
59
B
99
82
41
43
37
82
65
30
82
43
98
59
B
99
43
77
92
22
17
What number has 9 tens and 9 ones?B
What number has 3 tens and 7 ones?G
What number has 2 tens and 2 ones?N
What number has 7 tens and 8 ones?R
What number has 3 tens and 0 ones?W
What number has 8 tens and 2 ones?L
What number has 4 tens and 3 ones?E
What number has 7 tens and 7 ones?H
What number has 9 tens and 2 ones?I
What number has 1 ten and 7 ones?D
What number has 4 tens and 1 one?U
What number has 5 tens and 9 ones?T
What number has 9 tens and 8 ones?F
What number has 6 tens and 5 ones?O
0/14 letters found
Clue 5
Missing addends — the last clue
We need ten space tools but only have six. Find the missing number 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
2 + ___ = 11
9 + ___ = 19
9 + ___ = 17
5 + ___ = 8
1 + ___ = 13
10 + ___ = 14
8 + ___ = 13
8 + ___ = 15
2 + ___ = 3
6 + ___ = 12
7 + ___ = 18
Step 2 — cross out the sentence with each answer
1.The villain zooms off with a fast rocket pack, then zaps the lock with a hot laser tool.
2.The villain rolls past the base in a bumpy bubble rover, then grabs the metal with a strong magnet glove.
3.The villain soars through the air on a silent star glider, then grabs the metal with a strong magnet glove.
4.The villain soars through the air on a silent star glider, then makes things tiny with a fancy shrink beam.
5.The villain soars through the air on a silent star glider, then zaps the lock with a hot laser tool.
6.The villain clomps around in heavy gravity boots, then checks the map with a glowing radar watch.
7.The villain clomps around in heavy gravity boots, then zaps the lock with a hot laser tool.
8.The villain soars through the air on a silent star glider, then checks the map with a glowing radar watch.
9.The villain zooms off with a fast rocket pack, then lights up the dark with a bright plasma light.
10.The villain rides away on a noisy space scooter, then lights up the dark with a bright plasma light.
11.The villain rides away on a noisy space scooter, then checks the map with a glowing radar watch.
12.The villain rolls past the base in a bumpy bubble rover, then checks the map with a glowing radar watch.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Cosmic Cape Caper
Culprit: Sally (bumpy bubble rover · strong magnet glove · right handed · bright blue glow · loud space music)
- Clue 1 (Addition): "THE THIEF DOES NOT USE THE SHRINK BEAM"12 + 7 = 19 (T) · 5 + 3 = 8 (A) · 1 + 1 = 2 (F) · 1 + 2 = 3 (R) · 9 + 7 = 16 (S) · 8 + 6 = 14 (B) · 4 + 2 = 6 (M) · 4 + 6 = 10 (O) · 7 + 8 = 15 (E) · 8 + 12 = 20 (I) · 3 + 2 = 5 (D) · 3 + 10 = 13 (U) · 6 + 11 = 17 (N) · 13 + 5 = 18 (K) · 3 + 1 = 4 (H)
- Clue 2 (Subtraction): "THE RIGHT HANDED GLOVE PRINTS WERE SEEN"15 - 6 = 9 (T) · 8 - 2 = 6 (N) · 17 - 9 = 8 (P) · 18 - 5 = 13 (G) · 10 - 7 = 3 (A) · 8 - 6 = 2 (O) · 18 - 4 = 14 (E) · 20 - 2 = 18 (H) · 13 - 1 = 12 (R) · 15 - 4 = 11 (W) · 8 - 4 = 4 (D) · 11 - 4 = 7 (I) · 4 - 3 = 1 (L) · 16 - 6 = 10 (V) · 17 - 2 = 15 (S)
- Clue 3 (Skip counting): "FLED FROM LOUD SPACE MUSIC"Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, ___, 45, 50 = 40 (F) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20 = 16 (L) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150 = 130 (A) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14 = 10 (S) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ___, 42, 45 = 39 (P) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, ___, 33, 36 = 30 (O) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, ___, 60, 70 = 50 (C) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, ___, 20, 22 = 18 (D) · Skip-count by 5s. Fill the blank: 5, 10, ___, 20, 25 = 15 (I) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42 = 36 (U) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65 = 55 (R) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110 = 90 (E) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, ___, 26, 28 = 24 (M)
- Clue 4 (Place value): "BRIGHT BLUE GLOW LEFT BEHIND"What number has 9 tens and 9 ones? = 99 (B) · What number has 3 tens and 7 ones? = 37 (G) · What number has 2 tens and 2 ones? = 22 (N) · What number has 7 tens and 8 ones? = 78 (R) · What number has 3 tens and 0 ones? = 30 (W) · What number has 8 tens and 2 ones? = 82 (L) · What number has 4 tens and 3 ones? = 43 (E) · What number has 7 tens and 7 ones? = 77 (H) · What number has 9 tens and 2 ones? = 92 (I) · What number has 1 ten and 7 ones? = 17 (D) · What number has 4 tens and 1 one? = 41 (U) · What number has 5 tens and 9 ones? = 59 (T) · What number has 9 tens and 8 ones? = 98 (F) · What number has 6 tens and 5 ones? = 65 (O)
- Clue 5 (Missing addends): surviving statement (box 2) → Sally2 + ___ = 11 = 9 · 9 + ___ = 19 = 10 · 9 + ___ = 17 = 8 · 5 + ___ = 8 = 3 · 1 + ___ = 13 = 12 · 10 + ___ = 14 = 4 · 8 + ___ = 13 = 5 · 8 + ___ = 15 = 7 · 2 + ___ = 3 = 1 · 6 + ___ = 12 = 6 · 7 + ___ = 18 = 11
About this mystery
- Grade level
- Grade 1 math
- Math topics
- Addition, Subtraction, Skip counting, Place value, Missing addends
- Reading level
- grades 1-2
- Theme
- The Cosmic Cape Caper — set in Moonbase Alpha
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects