Math Crackers
Grade 1Reading: grades 1-2AdditionSubtractionSkip countingPlace valueMissing addends

The Case of the Missing Jungle Map

Someone snuck into camp and took the secret jungle map! The Jungle Patrol needs your help to look for tracks, solve math clues, and find out who took the map.

Suspects

Possible suspects

Cross off a row as each clue rules it out. On screen, tap a row.

21 of 21 still in play
NameGadgetVehicleStanceBandana ColorFear
ChloeCompass WatchTree SkimmerRight HandedGold BandanaLoud Whistles
AvaSmoke BombZip HarnessLeft HandedGold BandanaLoud Whistles
LukeSmoke BombRiver RaftRight HandedGold BandanaLoud Whistles
AriaGrappling HookTree SkimmerRight HandedBlue BandanaSqueaky Toys
NoahSmoke BombJungle GliderLeft HandedGold BandanaBright Lights
FinnCompass WatchRiver RaftRight HandedGold BandanaLoud Whistles
MayaNet LauncherJungle GliderLeft HandedRed BandanaSqueaky Toys
LiamFlashlight BeamRiver RaftLeft HandedGold BandanaLoud Whistles
EliGrappling HookTree SkimmerLeft HandedRed BandanaBright Lights
TobyNet LauncherZip HarnessLeft HandedBlue BandanaBright Lights
OwenGrappling HookJungle GliderRight HandedBlue BandanaSqueaky Toys
ZoeGrappling HookZip HarnessLeft HandedRed BandanaSqueaky Toys
LilyGrappling HookRiver RaftRight HandedBlue BandanaLoud Whistles
MaxFlashlight BeamMud BuggyRight HandedGold BandanaLoud Whistles
IvyGrappling HookMud BuggyRight HandedRed BandanaLoud Whistles
GraceSmoke BombZip HarnessRight HandedGold BandanaLoud Whistles
SamNet LauncherZip HarnessLeft HandedRed BandanaBright Lights
BenGrappling HookTree SkimmerLeft HandedBlue BandanaSqueaky Toys
RubyNet LauncherTree SkimmerRight HandedGold BandanaSqueaky Toys
NoraFlashlight BeamMud BuggyRight HandedGold BandanaBright Lights
LeoNet LauncherTree SkimmerLeft HandedBlue BandanaSqueaky Toys
Clue 1

Addition

Ranger Maya counts the track footprints in the mud to start the hunt.

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
11
5
14
15
19
13
8
12
T
11
8
17
14
3
13
17
T
11
18
12
8
14
19
T
11
18
14
14
3
9
12
7
7
14
18
5 + 6 =T
8 + 4 =I
11 + 8 =A
7 + 8 =B
7 + 6 =N
8 + 9 =O
3 + 6 =K
5 + 3 =D
12 + 6 =R
2 + 3 =H
2 + 1 =S
5 + 9 =E
3 + 4 =M
0/13 letters found
Clue 2

Subtraction

Ranger Leo checks the supply bag to see how many snacks are left.

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
7
13
11
9
16
19
10
15
T
7
13
11
3
10
T
7
13
11
1
16
6
17
15
T
7
13
T
7
13
11
15
5
5
15
4
13
T
7
13
16
19
10
12 - 5 =T
20 - 1 =N
7 - 1 =P
19 - 2 =W
11 - 6 =R
17 - 1 =A
20 - 5 =I
19 - 8 =E
12 - 3 =B
13 - 9 =G
9 - 8 =M
16 - 6 =D
15 - 2 =H
8 - 5 =L
0/14 letters found
Clue 3

Skip counting

Ranger Zoe counts the jungle steps by twos as she climbs the hill.

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
130
70
39
60
8
28
21
30
T
130
14
12
15
39
25
39
21
39
8
25
110
8
T
130
8
120
12
33
21
9
70
30
110
T
130
120
39
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150T
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, ___, 30, 32N
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ___, 42, 45E
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, 39U
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140L
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, ___, 30, 35R
Skip-count by 5s. Fill the blank: 5, 10, ___, 20, 25V
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130S
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, ___, 65, 70B
Skip-count by 10s. Fill the blank: 10, 20, ___, 40, 50I
Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12A
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, ___, 75, 80H
Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15W
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, ___, 16, 18C
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16O
0/16 letters found
Clue 4

Place value

Ranger Max reads the tens and ones on the locked camp chest.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

G
62
70
80
97
30
80
70
42
95
73
32
43
53
70
92
19
97
70
19
32
74
92
19
G
62
80
33
98
99
32
19
30
95
What number has 6 tens and 2 ones?G
What number has 9 tens and 2 ones?U
What number has 4 tens and 3 ones?S
What number has 7 tens and 4 ones?J
What number has 3 tens and 2 ones?A
What number has 4 tens and 2 ones?T
What number has 3 tens and 3 ones?E
What number has 9 tens and 8 ones?B
What number has 3 tens and 0 ones?C
What number has 8 tens and 0 ones?L
What number has 9 tens and 9 ones?R
What number has 5 tens and 3 ones?F
What number has 7 tens and 0 ones?O
What number has 7 tens and 3 ones?W
What number has 1 ten and 9 ones?N
What number has 9 tens and 5 ones?H
What number has 9 tens and 7 ones?D
0/17 letters found
Clue 5

Missing addends — the last clue

Ranger Ava finds out how many map pieces are needed to finish the puzzle.

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 + ___ = 20
3 + ___ = 6
6 + ___ = 10
10 + ___ = 17
5 + ___ = 7
7 + ___ = 18
10 + ___ = 11
3 + ___ = 13
10 + ___ = 16
1 + ___ = 10
6 + ___ = 11
Step 2 — cross out the sentence with each answer
1.The villain shined a flashlight beam, then zoomed off on a tree skimmer.
2.The villain fired a net launcher, then zipped off in a zip harness.
3.The villain dropped a smoke bomb, then paddled away on a river raft.
4.The villain shined a flashlight beam, then sped off in a mud buggy.
5.The villain fired a net launcher, then zoomed off on a tree skimmer.
6.The villain checked a compass watch, then soared away on a jungle glider.
7.The villain dropped a smoke bomb, then sped off in a mud buggy.
8.The villain checked a compass watch, then paddled away on a river raft.
9.The villain launched a grappling hook, then soared away on a jungle glider.
10.The villain fired a net launcher, then sped off in a mud buggy.
11.The villain shined a flashlight beam, then paddled away on a river raft.
12.The villain dropped a smoke bomb, then zipped off in a zip harness.
Solve it

Name the culprit

Choose the one suspect left standing.

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 Case of the Missing Jungle Map — set in Whispering Jungle Camp
Format
Interactive online & printable worksheet with answer key
Solution
One unique, verified culprit among 21 suspects

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