🚀 SpaceGrade 2Reading: grades 1-2Place valueAdditionSubtractionSkip countingMissing addends
Case of the Comet Crook
The Star Captain is gone! Someone snuck onto Star Hopper and grabbed her in the dark. You are the station's best space detective, and the clues are all over the deck.
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 | Space Power | Sneaky Trick | Crew Type | Glove Color | How To Stop It |
|---|---|---|---|---|---|
| Pilot Orin | glows super bright | hides in the vents | human crew | red gloves | a bright flashlight |
| Jupiter Wen | shrinks down tiny | flips off the lights | robot crew | red gloves | a loud space horn |
| Polaris Gus | floats through walls | fakes the captain's voice | human crew | green gloves | a sticky net |
| Galaxy Sun | glows super bright | flips off the lights | robot crew | red gloves | a loud space horn |
| Solar Pip | glows super bright | pops open hatches | human crew | red gloves | a sticky net |
| Comet Ray | floats through walls | hides in the vents | human crew | red gloves | a sticky net |
| Zenith Roe | zooms on a jetpack | flips off the lights | robot crew | red gloves | a loud space horn |
| Meteor Lin | shrinks down tiny | fakes the captain's voice | human crew | red gloves | a sticky net |
| Pluto Max | blasts cold star wind | fakes the captain's voice | robot crew | red gloves | a loud space horn |
| Saturn Rey | blasts cold star wind | freezes the doors | robot crew | red gloves | a sticky net |
| Mars Tia | glows super bright | freezes the doors | robot crew | green gloves | a loud space horn |
| Nebula Fen | shrinks down tiny | flips off the lights | robot crew | green gloves | a bright flashlight |
| Lyra Bex | floats through walls | pops open hatches | robot crew | green gloves | a bright flashlight |
| Captain Vega | glows super bright | freezes the doors | human crew | red gloves | a sticky net |
| Orbit Tam | shrinks down tiny | fakes the captain's voice | robot crew | green gloves | a sticky net |
| Astra Quill | blasts cold star wind | hides in the vents | human crew | blue gloves | a sticky net |
| Atlas Cole | glows super bright | hides in the vents | robot crew | green gloves | a loud space horn |
| Luna Sky | glows super bright | fakes the captain's voice | robot crew | red gloves | a sticky net |
| Star Mio | shrinks down tiny | pops open hatches | robot crew | red gloves | a loud space horn |
| Astro Bel | floats through walls | freezes the doors | human crew | red gloves | a sticky net |
| Nova Pax | shrinks down tiny | freezes the doors | human crew | red gloves | a loud space horn |
Clue 1
Place value (tens & ones)
You find a logbook open on the desk. The number by the crook's name has a tens digit and a ones digit, so you read the place value to learn what the crook cannot do.
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
42
51
29
26
28
28
34
26
32
96
34
32
32
38
T
36
80
34
63
51
T
36
42
51
96
34
50
T
36
34
26
32
60
29
38
26
96
51
What number has 3 tens and 6 ones?T
What number has 3 tens and 4 ones?A
What number has 3 tens and 2 ones?N
What number has 2 tens and 8 ones?L
What number has 4 tens and 2 ones?H
What number has 6 tens and 0 ones?S
What number has 9 tens and 6 ones?C
What number has 3 tens and 8 ones?O
What number has 8 tens and 0 ones?F
What number has 2 tens and 6 ones?I
What number has 5 tens and 0 ones?P
What number has 5 tens and 1 one?E
What number has 2 tens and 9 ones?V
What number has 6 tens and 3 ones?K
0/14 letters found
Clue 2
Addition
You count the dropped tools in two piles. Add the piles to see how many the crew type left behind, and that tells you who was at the door.
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
65
93
74
51
74
34
38
93
63
82
82
A
65
26
26
63
63
97
51
77
34
68
63
25
74
74
93
21 + 44 =A
8 + 17 =D
27 + 11 =C
42 + 40 =W
19 + 7 =S
21 + 47 =H
35 + 28 =E
57 + 40 =N
36 + 57 =R
50 + 27 =Y
41 + 33 =O
14 + 20 =T
21 + 30 =B
0/13 letters found
Clue 3
Subtraction
The flashlight battery started full and now shows less power. Subtract to see how much was used, and learn what made the crook run away.
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
75
17
25
39
43
53
88
A
75
55
29
44
25
89
66
56
A
75
43
29
28
33
89
39
66
A
75
57
A
75
87
96 - 21 =A
85 - 19 =N
120 - 32 =P
93 - 4 =R
67 - 24 =D
31 - 6 =O
45 - 28 =L
80 - 27 =S
63 - 7 =M
88 - 33 =C
65 - 37 =I
102 - 15 =Y
78 - 34 =H
47 - 8 =U
68 - 39 =E
89 - 32 =W
39 - 6 =T
0/17 letters found
Clue 4
Skip counting
Star tracks lead down the hall in even steps. Skip count the glowing footprints to find the glove color left at the scene.
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
20
10
26
21
39
15
65
6
26
24
A
20
30
15
26
50
33
65
80
33
18
26
50
15
65
65
10
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, ___, 22, 24A
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100N
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27D
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39T
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ___, 42, 45G
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30E
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, ___, 60, 70F
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, ___, 26, 28W
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14R
Skip-count by 2s. Fill the blank: 2, 4, ___, 8, 10V
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, ___, 21, 24H
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, ___, 18, 21L
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75O
Skip-count by 10s. Fill the blank: 10, 20, ___, 40, 50S
0/14 letters found
Clue 5
Missing addends — the last clue
The space horn needs a set number of charges. Some are loaded, so find the missing charges to point at the real Comet Crook.
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
8 + ___ = 15
5 + ___ = 17
8 + ___ = 13
1 + ___ = 10
2 + ___ = 3
9 + ___ = 15
6 + ___ = 10
7 + ___ = 9
2 + ___ = 10
8 + ___ = 11
10 + ___ = 20
Step 2 — cross out the sentence with each answer
1.The villain blasts cold star wind, then hides in the vents.
2.The villain zooms on a jetpack, then hides in the vents.
3.The villain shrinks down tiny, then fakes the captain's voice.
4.The villain zooms on a jetpack, then pops open hatches.
5.The villain zooms on a jetpack, then flips off the lights.
6.The villain floats through walls, then pops open hatches.
7.The villain glows super bright, then flips off the lights.
8.The villain floats through walls, then fakes the captain's voice.
9.The villain blasts cold star wind, then pops open hatches.
10.The villain glows super bright, then fakes the captain's voice.
11.The villain shrinks down tiny, then flips off the lights.
12.The villain shrinks down tiny, then pops open hatches.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — Case of the Comet Crook
Culprit: Jupiter Wen (shrinks down tiny · flips off the lights · robot crew · red gloves · a loud space horn)
- Clue 1 (Place value (tens & ones)): "THE VILLAIN CANNOT FAKE THE CAPTAINS VOICE"What number has 3 tens and 6 ones? = 36 (T) · What number has 3 tens and 4 ones? = 34 (A) · What number has 3 tens and 2 ones? = 32 (N) · What number has 2 tens and 8 ones? = 28 (L) · What number has 4 tens and 2 ones? = 42 (H) · What number has 6 tens and 0 ones? = 60 (S) · What number has 9 tens and 6 ones? = 96 (C) · What number has 3 tens and 8 ones? = 38 (O) · What number has 8 tens and 0 ones? = 80 (F) · What number has 2 tens and 6 ones? = 26 (I) · What number has 5 tens and 0 ones? = 50 (P) · What number has 5 tens and 1 one? = 51 (E) · What number has 2 tens and 9 ones? = 29 (V) · What number has 6 tens and 3 ones? = 63 (K)
- Clue 2 (Addition): "A ROBOT CREW WAS SEEN BY THE DOOR"21 + 44 = 65 (A) · 8 + 17 = 25 (D) · 27 + 11 = 38 (C) · 42 + 40 = 82 (W) · 19 + 7 = 26 (S) · 21 + 47 = 68 (H) · 35 + 28 = 63 (E) · 57 + 40 = 97 (N) · 36 + 57 = 93 (R) · 50 + 27 = 77 (Y) · 41 + 33 = 74 (O) · 14 + 20 = 34 (T) · 21 + 30 = 51 (B)
- Clue 3 (Subtraction): "A LOUD SPACE HORN MADE IT RUN AWAY"96 - 21 = 75 (A) · 85 - 19 = 66 (N) · 120 - 32 = 88 (P) · 93 - 4 = 89 (R) · 67 - 24 = 43 (D) · 31 - 6 = 25 (O) · 45 - 28 = 17 (L) · 80 - 27 = 53 (S) · 63 - 7 = 56 (M) · 88 - 33 = 55 (C) · 65 - 37 = 28 (I) · 102 - 15 = 87 (Y) · 78 - 34 = 44 (H) · 47 - 8 = 39 (U) · 68 - 39 = 29 (E) · 89 - 32 = 57 (W) · 39 - 6 = 33 (T)
- Clue 4 (Skip counting): "A RED GLOVE WAS LEFT ON THE FLOOR"Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, ___, 22, 24 = 20 (A) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100 = 80 (N) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27 = 21 (D) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39 = 33 (T) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ___, 42, 45 = 39 (G) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30 = 26 (E) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, ___, 60, 70 = 50 (F) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, ___, 26, 28 = 24 (W) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14 = 10 (R) · Skip-count by 2s. Fill the blank: 2, 4, ___, 8, 10 = 6 (V) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, ___, 21, 24 = 18 (H) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, ___, 18, 21 = 15 (L) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75 = 65 (O) · Skip-count by 10s. Fill the blank: 10, 20, ___, 40, 50 = 30 (S)
- Clue 5 (Missing addends): surviving statement (box 11) → Jupiter Wen8 + ___ = 15 = 7 · 5 + ___ = 17 = 12 · 8 + ___ = 13 = 5 · 1 + ___ = 10 = 9 · 2 + ___ = 3 = 1 · 9 + ___ = 15 = 6 · 6 + ___ = 10 = 4 · 7 + ___ = 9 = 2 · 2 + ___ = 10 = 8 · 8 + ___ = 11 = 3 · 10 + ___ = 20 = 10
About this mystery
- Grade level
- Grade 2 math
- Math topics
- Place value, Addition, Subtraction, Skip counting, Missing addends
- Reading level
- grades 1-2
- Theme
- Case of the Comet Crook — set in the space station Star Hopper
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects