Grade 2Reading: grades 1-2AdditionSubtractionPlace valueSkip countingMissing addends
The Great Backyard Map Hunt
Oh no! Someone snuck into the secret treehouse and took the golden map. We need to follow the trail and find the Map Snatcher before lunch!
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 | Favorite Shortcut | Club Gear | Map Writing Hand | Detectives Cap | Best Snack Treat |
|---|---|---|---|---|---|
| Lily | Wooden Plank | Shiny Compass | Left Handed | Red Cap | Cheese Stick |
| Ruby | Jungle Vine | Spy Watch | Left Handed | Blue Cap | Juice Box |
| Nora | Tree Branch | Spy Watch | Left Handed | Red Cap | Cheese Stick |
| Zoe | Jungle Vine | Toy Binoculars | Right Handed | Green Cap | Apple Slice |
| Maya | Wooden Plank | Walkie Talkie | Right Handed | Green Cap | Apple Slice |
| Finn | Tree Branch | Spy Watch | Left Handed | Blue Cap | Juice Box |
| Eli | Tire Swing | Toy Binoculars | Left Handed | Red Cap | Cheese Stick |
| Jack | Jungle Vine | Walkie Talkie | Right Handed | Green Cap | Apple Slice |
| Abby | Tree Branch | Secret Badge | Left Handed | Green Cap | Juice Box |
| Sam | Tree Branch | Secret Badge | Left Handed | Green Cap | Cheese Stick |
| Leo | Rope Ladder | Secret Badge | Right Handed | Green Cap | Apple Slice |
| Noah | Wooden Plank | Secret Badge | Left Handed | Red Cap | Juice Box |
| Emma | Rope Ladder | Walkie Talkie | Left Handed | Green Cap | Juice Box |
| Cora | Tree Branch | Toy Binoculars | Right Handed | Green Cap | Cheese Stick |
| Mia | Rope Ladder | Toy Binoculars | Left Handed | Red Cap | Cheese Stick |
| Ella | Tire Swing | Secret Badge | Right Handed | Blue Cap | Juice Box |
| Luke | Wooden Plank | Toy Binoculars | Left Handed | Blue Cap | Juice Box |
| Toby | Rope Ladder | Shiny Compass | Left Handed | Red Cap | Cheese Stick |
| Cole | Wooden Plank | Shiny Compass | Left Handed | Blue Cap | Apple Slice |
| Owen | Tree Branch | Walkie Talkie | Left Handed | Green Cap | Juice Box |
| Sadie | Tree Branch | Toy Binoculars | Right Handed | Red Cap | Cheese Stick |
Clue 1
Addition
We counted the blue flags on the fort. Then we added the yellow flags to find the total. Our math helped us read 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
74
59
75
90
57
61
T
74
83
59
75
34
52
24
75
90
57
24
T
74
59
61
40
75
61
90
56
67
36
61
T
74
83
59
28 + 46 =T
21 + 15 =W
17 + 7 =O
19 + 38 =N
53 + 22 =E
34 + 49 =C
52 + 38 =S
12 + 28 =V
21 + 40 =A
39 + 28 =Y
41 + 18 =H
34 + 22 =P
23 + 11 =R
27 + 25 =D
0/14 letters found
Clue 2
Subtraction
We started with ten chalk pieces. We lost some in the sandbox. We subtracted to see how many were left and found 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
64
44
36
84
22
57
T
64
52
44
36
89
28
89
76
T
64
36
84
28
76
T
64
44
T
64
44
36
11
36
65
T
64
44
57
22
21
100 - 36 =T
49 - 38 =L
85 - 28 =A
63 - 35 =W
74 - 22 =C
28 - 7 =D
70 - 34 =E
113 - 24 =R
84 - 40 =H
70 - 5 =F
116 - 32 =S
84 - 8 =I
48 - 26 =N
0/13 letters found
Clue 3
Place value
A secret code was written on the slide. It had five tens and three ones. We used place value to unlock the next 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
22
17
61
42
35
78
T
22
33
17
61
60
77
78
35
T
22
42
78
97
61
84
84
52
77
33
17
61
61
42
61
42
T
22
23
33
55
What number has 2 tens and 2 ones?T
What number has 4 tens and 2 ones?S
What number has 2 tens and 3 ones?I
What number has 1 ten and 7 ones?H
What number has 6 tens and 0 ones?R
What number has 9 tens and 7 ones?Y
What number has 5 tens and 2 ones?O
What number has 7 tens and 7 ones?W
What number has 3 tens and 5 ones?N
What number has 5 tens and 5 ones?K
What number has 6 tens and 1 one?E
What number has 8 tens and 4 ones?L
What number has 3 tens and 3 ones?C
What number has 7 tens and 8 ones?A
0/14 letters found
Clue 4
Skip counting
We saw footprints in the mud going by twos. We skip counted the prints all the way to the big oak tree 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.
W
80
8
28
27
14
12
10
36
40
100
18
33
9
90
100
8
10
65
36
6
27
12
90
9
8
33
100
36
22
22
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100W
Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15H
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75C
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, ___, 20, 22I
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33O
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, ___, 30, 32F
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, ___, 45, 50B
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14D
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120R
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16N
Skip-count by 2s. Fill the blank: 2, 4, ___, 8, 10P
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26S
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39G
Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12E
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, ___, 16, 18U
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110T
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42A
0/17 letters found
Clue 5
Missing addends — the last clue
We need eight shiny coins to open the club box. We have five. We figured out how many more we need and got the final clue!
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
4 + ___ = 13
5 + ___ = 6
7 + ___ = 14
3 + ___ = 7
10 + ___ = 15
10 + ___ = 20
7 + ___ = 9
7 + ___ = 15
5 + ___ = 8
6 + ___ = 17
8 + ___ = 20
Step 2 — cross out the sentence with each answer
1.The villain climbs up the rope ladder, then looks through the toy binoculars.
2.The villain crawls along the tree branch, then taps the spy watch.
3.The villain leaps off the tire swing, then taps the spy watch.
4.The villain swings on the jungle vine, then polishes the secret badge.
5.The villain runs across the wooden plank, then whispers into the walkie talkie.
6.The villain leaps off the tire swing, then looks through the toy binoculars.
7.The villain runs across the wooden plank, then checks the shiny compass.
8.The villain crawls along the tree branch, then whispers into the walkie talkie.
9.The villain climbs up the rope ladder, then checks the shiny compass.
10.The villain swings on the jungle vine, then taps the spy watch.
11.The villain runs across the wooden plank, then looks through the toy binoculars.
12.The villain swings on the jungle vine, then checks the shiny compass.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Great Backyard Map Hunt
Culprit: Eli (Tire Swing · Toy Binoculars · Left Handed · Red Cap · Cheese Stick)
- Clue 1 (Addition): "THE SNATCHER DOES NOT HAVE A SPY WATCH"28 + 46 = 74 (T) · 21 + 15 = 36 (W) · 17 + 7 = 24 (O) · 19 + 38 = 57 (N) · 53 + 22 = 75 (E) · 34 + 49 = 83 (C) · 52 + 38 = 90 (S) · 12 + 28 = 40 (V) · 21 + 40 = 61 (A) · 39 + 28 = 67 (Y) · 41 + 18 = 59 (H) · 34 + 22 = 56 (P) · 23 + 11 = 34 (R) · 27 + 25 = 52 (D)
- Clue 2 (Subtraction): "THE SNATCHER WRITES WITH THE LEFT HAND"100 - 36 = 64 (T) · 49 - 38 = 11 (L) · 85 - 28 = 57 (A) · 63 - 35 = 28 (W) · 74 - 22 = 52 (C) · 28 - 7 = 21 (D) · 70 - 34 = 36 (E) · 113 - 24 = 89 (R) · 84 - 40 = 44 (H) · 70 - 5 = 65 (F) · 116 - 32 = 84 (S) · 84 - 8 = 76 (I) · 48 - 26 = 22 (N)
- Clue 3 (Place value): "THE SNATCHER WANTS A YELLOW CHEESE STICK"What number has 2 tens and 2 ones? = 22 (T) · What number has 4 tens and 2 ones? = 42 (S) · What number has 2 tens and 3 ones? = 23 (I) · What number has 1 ten and 7 ones? = 17 (H) · What number has 6 tens and 0 ones? = 60 (R) · What number has 9 tens and 7 ones? = 97 (Y) · What number has 5 tens and 2 ones? = 52 (O) · What number has 7 tens and 7 ones? = 77 (W) · What number has 3 tens and 5 ones? = 35 (N) · What number has 5 tens and 5 ones? = 55 (K) · What number has 6 tens and 1 one? = 61 (E) · What number has 8 tens and 4 ones? = 84 (L) · What number has 3 tens and 3 ones? = 33 (C) · What number has 7 tens and 8 ones? = 78 (A)
- Clue 4 (Skip counting): "WE FOUND A BRIGHT RED CAP ON THE GRASS"Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100 = 80 (W) · Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15 = 9 (H) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75 = 65 (C) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, ___, 20, 22 = 18 (I) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33 = 27 (O) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, ___, 30, 32 = 28 (F) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, ___, 45, 50 = 40 (B) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14 = 10 (D) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120 = 100 (R) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16 = 12 (N) · Skip-count by 2s. Fill the blank: 2, 4, ___, 8, 10 = 6 (P) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26 = 22 (S) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39 = 33 (G) · Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12 = 8 (E) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, ___, 16, 18 = 14 (U) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110 = 90 (T) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42 = 36 (A)
- Clue 5 (Missing addends): surviving statement (box 6) → Eli4 + ___ = 13 = 9 · 5 + ___ = 6 = 1 · 7 + ___ = 14 = 7 · 3 + ___ = 7 = 4 · 10 + ___ = 15 = 5 · 10 + ___ = 20 = 10 · 7 + ___ = 9 = 2 · 7 + ___ = 15 = 8 · 5 + ___ = 8 = 3 · 6 + ___ = 17 = 11 · 8 + ___ = 20 = 12
About this mystery
- Grade level
- Grade 2 math
- Math topics
- Addition, Subtraction, Place value, Skip counting, Missing addends
- Reading level
- grades 1-2
- Theme
- The Great Backyard Map Hunt — set in The Sunny Hills Backyard
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects