🤖 RobotsGrade 1Reading: grades 1-2Place valueAdditionSubtractionSkip countingMissing addends
The Great Robo-Scrap Caper
Oh no! A rogue glitch-bot broke into the factory and took the golden computer chip! We need to find the right bot and fix its programming.
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 | Main Tool | Special Upgrade | Antenna Signal | Head Wire Style | System Glitch |
|---|---|---|---|---|---|
| Mae | Driller Nose | Solar Panels | Right light blinks | Blue yarn | Strong magnets |
| Clank | Laser Eyes | Oil Slicker | Left light blinks | Copper wires | Soapy water |
| Rusty | Laser Eyes | Net Launcher | Left light blinks | Spiky bolts | Soapy water |
| Edison | Rocket Boots | Oil Slicker | Left light blinks | Spiky bolts | Banana peels |
| Isaac | Rocket Boots | Solar Panels | Right light blinks | Blue yarn | Banana peels |
| Dot | Magnet Hands | Bubble Blaster | Right light blinks | Spiky bolts | Strong magnets |
| Hal | Magnet Hands | Speaker Chest | Left light blinks | Blue yarn | Soapy water |
| Grace | Magnet Hands | Solar Panels | Left light blinks | Blue yarn | Banana peels |
| Curie | Driller Nose | Net Launcher | Right light blinks | Blue yarn | Soapy water |
| Otto | Laser Eyes | Net Launcher | Left light blinks | Copper wires | Strong magnets |
| Sparky | Spring Legs | Oil Slicker | Right light blinks | Blue yarn | Banana peels |
| Bolt | Rocket Boots | Oil Slicker | Right light blinks | Blue yarn | Strong magnets |
| Tesla | Driller Nose | Net Launcher | Left light blinks | Spiky bolts | Soapy water |
| Widget | Magnet Hands | Bubble Blaster | Right light blinks | Blue yarn | Banana peels |
| Gizmo | Laser Eyes | Speaker Chest | Right light blinks | Copper wires | Banana peels |
| Sprocket | Magnet Hands | Net Launcher | Right light blinks | Blue yarn | Banana peels |
| Ada | Rocket Boots | Net Launcher | Right light blinks | Blue yarn | Banana peels |
| Alan | Driller Nose | Solar Panels | Left light blinks | Spiky bolts | Banana peels |
| Albert | Spring Legs | Oil Slicker | Right light blinks | Blue yarn | Soapy water |
| Watson | Rocket Boots | Oil Slicker | Right light blinks | Copper wires | Strong magnets |
| Lovelace | Magnet Hands | Solar Panels | Left light blinks | Spiky bolts | Strong magnets |
Clue 1
Place value
We look at the robot screen. It shows tens and ones to find a 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
61
60
18
29
68
36
29
51
T
61
36
51
18
23
57
51
T
61
29
83
68
23
T
61
29
81
29
29
83
18
23
What number has 6 tens and 1 one?T
What number has 1 ten and 8 ones?E
What number has 8 tens and 1 one?U
What number has 8 tens and 3 ones?L
What number has 6 tens and 8 ones?A
What number has 6 tens and 0 ones?H
What number has 2 tens and 3 ones?S
What number has 5 tens and 1 one?O
What number has 2 tens and 9 ones?B
What number has 3 tens and 6 ones?D
What number has 5 tens and 7 ones?N
0/11 letters found
Clue 2
Addition
We find two piles of loose bolts. Let us add them up.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
R
4
3
20
17
9
2
3
20
17
9
5
2
13
8
17
12
11
3
18
9
17
12
11
13
R
4
19
1 + 3 =R
4 + 4 =S
8 + 9 =H
1 + 2 =I
1 + 1 =L
9 + 11 =G
6 + 12 =N
7 + 6 =A
5 + 4 =T
7 + 4 =D
14 + 5 =K
9 + 3 =E
1 + 4 =F
0/13 letters found
Clue 3
Subtraction
The runaway robot leaks oil. Its oil tank is getting lower.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
I
16
12
9
19
I
16
14
2
9
10
18
1
2
19
19
10
8
7
2
2
19
9
19 - 3 =I
17 - 3 =D
5 - 4 =Y
14 - 7 =P
20 - 1 =L
5 - 3 =E
11 - 2 =S
19 - 1 =N
15 - 5 =O
15 - 7 =W
15 - 3 =T
0/11 letters found
Clue 4
Skip counting
We follow the track of oil drops. They are spaced by fives.
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
35
50
140
21
16
10
A
35
110
33
30
60
110
16
A
35
26
22
A
35
18
26
110
9
24
24
16
26
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45A
Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15O
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, ___, 21, 24S
Skip-count by 10s. Fill the blank: 10, 20, ___, 40, 50T
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39N
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14Y
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160L
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, ___, 70, 80H
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20E
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26W
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27U
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30D
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130R
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, ___, 55, 60B
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, ___, 26, 28P
0/15 letters found
Clue 5
Missing addends — the last clue
We need six gears to lock the door. We only have some.
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
4 + ___ = 8
10 + ___ = 20
1 + ___ = 8
7 + ___ = 18
1 + ___ = 3
4 + ___ = 7
4 + ___ = 5
3 + ___ = 11
6 + ___ = 11
10 + ___ = 22
Step 2 — cross out the sentence with each answer
1.The villain zaps the computer screen, then shoots a stream of soapy bubbles.
2.The villain drills through the steel floor, then sprays a pool of slippery oil.
3.The villain drills through the steel floor, then shines its bright solar panels.
4.The villain bounces through the open window, then sprays a pool of slippery oil.
5.The villain grabs the golden power core, then sprays a pool of slippery oil.
6.The villain grabs the golden power core, then throws a big blue net.
7.The villain grabs the golden power core, then blasts loud funny music.
8.The villain grabs the golden power core, then shoots a stream of soapy bubbles.
9.The villain zooms over the high scrap wall, then throws a big blue net.
10.The villain zooms over the high scrap wall, then shines its bright solar panels.
11.The villain bounces through the open window, then throws a big blue net.
12.The villain zooms over the high scrap wall, then sprays a pool of slippery oil.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Great Robo-Scrap Caper
Culprit: Sprocket (Magnet Hands · Net Launcher · Right light blinks · Blue yarn · Banana peels)
- Clue 1 (Place value): "THE BAD BOT DOES NOT BLAST BUBBLES"What number has 6 tens and 1 one? = 61 (T) · What number has 1 ten and 8 ones? = 18 (E) · What number has 8 tens and 1 one? = 81 (U) · What number has 8 tens and 3 ones? = 83 (L) · What number has 6 tens and 8 ones? = 68 (A) · What number has 6 tens and 0 ones? = 60 (H) · What number has 2 tens and 3 ones? = 23 (S) · What number has 5 tens and 1 one? = 51 (O) · What number has 2 tens and 9 ones? = 29 (B) · What number has 3 tens and 6 ones? = 36 (D) · What number has 5 tens and 7 ones? = 57 (N)
- Clue 2 (Addition): "RIGHT LIGHT FLASHED IN THE DARK"1 + 3 = 4 (R) · 4 + 4 = 8 (S) · 8 + 9 = 17 (H) · 1 + 2 = 3 (I) · 1 + 1 = 2 (L) · 9 + 11 = 20 (G) · 6 + 12 = 18 (N) · 7 + 6 = 13 (A) · 5 + 4 = 9 (T) · 7 + 4 = 11 (D) · 14 + 5 = 19 (K) · 9 + 3 = 12 (E) · 1 + 4 = 5 (F)
- Clue 3 (Subtraction): "IT SLIDES ON YELLOW PEELS"19 - 3 = 16 (I) · 17 - 3 = 14 (D) · 5 - 4 = 1 (Y) · 14 - 7 = 7 (P) · 20 - 1 = 19 (L) · 5 - 3 = 2 (E) · 11 - 2 = 9 (S) · 19 - 1 = 18 (N) · 15 - 5 = 10 (O) · 15 - 7 = 8 (W) · 15 - 3 = 12 (T)
- Clue 4 (Skip counting): "A BLUE YARN THREAD WAS DROPPED"Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45 = 35 (A) · Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15 = 9 (O) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, ___, 21, 24 = 18 (S) · Skip-count by 10s. Fill the blank: 10, 20, ___, 40, 50 = 30 (T) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39 = 33 (N) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14 = 10 (Y) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160 = 140 (L) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, ___, 70, 80 = 60 (H) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20 = 16 (E) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26 = 22 (W) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27 = 21 (U) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30 = 26 (D) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130 = 110 (R) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, ___, 55, 60 = 50 (B) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, ___, 26, 28 = 24 (P)
- Clue 5 (Missing addends): surviving statement (box 6) → Sprocket2 + ___ = 11 = 9 · 4 + ___ = 8 = 4 · 10 + ___ = 20 = 10 · 1 + ___ = 8 = 7 · 7 + ___ = 18 = 11 · 1 + ___ = 3 = 2 · 4 + ___ = 7 = 3 · 4 + ___ = 5 = 1 · 3 + ___ = 11 = 8 · 6 + ___ = 11 = 5 · 10 + ___ = 22 = 12
About this mystery
- Grade level
- Grade 1 math
- Math topics
- Place value, Addition, Subtraction, Skip counting, Missing addends
- Reading level
- grades 1-2
- Theme
- The Great Robo-Scrap Caper — set in Bolt City Toy Factory
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects