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⚽ Cal summer camp, football, bGrade 1Reading: grades 1-2SubtractionAdditionPlace valueMultiplicationMissing addends

The Camp Grizzly Valley Mystery

Welcome to Camp Grizzly Valley in sunny California! Someone took the Golden Camp Trophy. The sneaky camper left a trail of sports gear on the field. Detective Teddy, Miles, and Ada are on the case. They need your help to solve the mystery and find the trophy!

Suspects

Possible suspects

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

21 of 21 still in play
NameFavorite SportCamp GearWriting HandHat ColorCamp Snack
Daksoccerclipboardleft-handedblue capapple slices
Kobebasketballsweatbandleft-handedgreen capcheese stick
Tombasketballsweatbandright-handedgreen capapple slices
Adago-kart racingclipboardleft-handedgreen capjuice box
Giannissoccerwhistleleft-handedred capcheese stick
Miabasketballclipboardright-handedblue capcheese stick
LeBrontennissweatbandright-handedgreen capjuice box
Tigerbasketballclipboardright-handedblue capapple slices
Travisgo-kart racingwater bottleleft-handedgreen capjuice box
Patrickbasketballwater bottleright-handedgreen capapple slices
Simonego-kart racingstopwatchright-handedgreen capjuice box
Serenafootballwhistleleft-handedred capapple slices
Shoheitennissweatbandleft-handedgreen capjuice box
Ziontennisstopwatchleft-handedgreen capjuice box
Caitlinsoccerstopwatchleft-handedgreen capjuice box
Teddygo-kart racingclipboardright-handedblue capjuice box
Stephengo-kart racingsweatbandleft-handedred capjuice box
Milestennisstopwatchleft-handedblue capcheese stick
Lamartennisstopwatchright-handedgreen capcheese stick
Cocogo-kart racingwhistleleft-handedred capapple slices
Usainsoccerstopwatchright-handedgreen capapple slices
Clue 1

Subtraction

Detective Teddy checks the gear shed. He starts with ten footballs but two are missing. We must subtract to find how many are left. This number opens a safe.

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

Addition

Detective Miles looks at the basketball rack. He adds three red balls and four blue balls together. This big sum points us to a new clue on the court.

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
10
18
4
17
20
18
6
12
18
15
18
6
7
16
5
18
2
12
7
T
9
10
13
17
18
3
T
9
10
13
5
2
5 + 4 =T
1 + 3 =C
2 + 1 =F
8 + 12 =U
1 + 4 =N
9 + 9 =E
12 + 5 =L
1 + 5 =S
1 + 1 =D
6 + 7 =A
5 + 7 =W
3 + 7 =H
5 + 2 =I
5 + 10 =R
7 + 9 =G
0/15 letters found
Clue 3

Place value (tens & ones)

Detective Ada looks at the giant camp scoreboard. The score has a five in the tens place and a two in the ones place. This special number unlocks a secret message.

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
58
16
12
80
12
63
99
87
99
12
60
73
T
58
11
87
T
58
80
99
63
40
80
19
60
99
97
54
95
56
12
26
19
21
What number has 5 tens and 8 ones?T
What number has 2 tens and 6 ones?B
What number has 8 tens and 7 ones?S
What number has 5 tens and 6 ones?C
What number has 8 tens and 0 ones?R
What number has 2 tens and 1 one?X
What number has 1 ten and 1 one?Y
What number has 9 tens and 5 ones?I
What number has 6 tens and 3 ones?W
What number has 1 ten and 2 ones?E
What number has 7 tens and 3 ones?P
What number has 4 tens and 0 ones?F
What number has 9 tens and 9 ones?A
What number has 5 tens and 4 ones?U
What number has 6 tens and 0 ones?M
What number has 1 ten and 6 ones?H
What number has 9 tens and 7 ones?J
What number has 1 ten and 9 ones?O
0/18 letters found
Clue 4

Multiplication facts (1-12)

Teddy counts the racing cones on the track. They are set up in three rows of four. We can multiply to find the total and read the next clue on the grass.

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
3
33
64
6
110
49
10
4
6
110
110
1
10
21
6
110
A
3
12
49
1
A
3
4
4
110
12
64
1
10
21
110
4
A
3
10
110
3 × 1 =A
8 × 8 =O
3 × 4 =D
7 × 7 =S
1 × 1 =N
4 × 1 =G
3 × 11 =F
2 × 3 =R
3 × 7 =H
10 × 11 =E
2 × 5 =T
0/11 letters found
Clue 5

Missing addends — the last clue

Miles has six juice boxes in total. He only sees four juice boxes on the picnic table. How many juice boxes are missing? Finding the missing part gives us 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
2 + ___ = 11
6 + ___ = 11
6 + ___ = 7
4 + ___ = 12
3 + ___ = 13
10 + ___ = 13
1 + ___ = 5
3 + ___ = 15
10 + ___ = 12
9 + ___ = 15
9 + ___ = 16
Step 2 — cross out the sentence with each answer
1.The villain kicked a soccer ball, then clicked a stopwatch.
2.The villain passed a football, then drank a water bottle.
3.The villain served a tennis ball, then blew a loud whistle.
4.The villain drove a go-kart, then blew a loud whistle.
5.The villain served a tennis ball, then wiped a sweatband.
6.The villain passed a football, then blew a loud whistle.
7.The villain kicked a soccer ball, then blew a loud whistle.
8.The villain dribbled a basketball, then wiped a sweatband.
9.The villain drove a go-kart, then dropped a clipboard.
10.The villain dribbled a basketball, then drank a water bottle.
11.The villain served a tennis ball, then clicked a stopwatch.
12.The villain dribbled a basketball, then dropped a clipboard.
Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — The Camp Grizzly Valley Mystery

Culprit: Zion (tennis · stopwatch · left-handed · green cap · juice box)
  1. Clue 1 (Subtraction): "THE SNEAKY CAMPER HAS NO WATER BOTTLE"
    12 - 9 = 3 (T) · 8 - 6 = 2 (O) · 11 - 3 = 8 (A) · 19 - 4 = 15 (K) · 15 - 4 = 11 (H) · 13 - 8 = 5 (B) · 16 - 9 = 7 (P) · 12 - 2 = 10 (M) · 7 - 1 = 6 (Y) · 13 - 9 = 4 (L) · 19 - 6 = 13 (N) · 15 - 1 = 14 (W) · 19 - 3 = 16 (R) · 12 - 3 = 9 (S) · 16 - 4 = 12 (C) · 20 - 1 = 19 (E)
  2. Clue 2 (Addition): "THE CLUES WERE SIGNED WITH A LEFT HAND"
    5 + 4 = 9 (T) · 1 + 3 = 4 (C) · 2 + 1 = 3 (F) · 8 + 12 = 20 (U) · 1 + 4 = 5 (N) · 9 + 9 = 18 (E) · 12 + 5 = 17 (L) · 1 + 5 = 6 (S) · 1 + 1 = 2 (D) · 6 + 7 = 13 (A) · 5 + 7 = 12 (W) · 3 + 7 = 10 (H) · 5 + 2 = 7 (I) · 5 + 10 = 15 (R) · 7 + 9 = 16 (G)
  3. Clue 3 (Place value (tens & ones)): "THERE WAS A EMPTY STRAW FROM A JUICE BOX"
    What number has 5 tens and 8 ones? = 58 (T) · What number has 2 tens and 6 ones? = 26 (B) · What number has 8 tens and 7 ones? = 87 (S) · What number has 5 tens and 6 ones? = 56 (C) · What number has 8 tens and 0 ones? = 80 (R) · What number has 2 tens and 1 one? = 21 (X) · What number has 1 ten and 1 one? = 11 (Y) · What number has 9 tens and 5 ones? = 95 (I) · What number has 6 tens and 3 ones? = 63 (W) · What number has 1 ten and 2 ones? = 12 (E) · What number has 7 tens and 3 ones? = 73 (P) · What number has 4 tens and 0 ones? = 40 (F) · What number has 9 tens and 9 ones? = 99 (A) · What number has 5 tens and 4 ones? = 54 (U) · What number has 6 tens and 0 ones? = 60 (M) · What number has 1 ten and 6 ones? = 16 (H) · What number has 9 tens and 7 ones? = 97 (J) · What number has 1 ten and 9 ones? = 19 (O)
  4. Clue 4 (Multiplication facts (1-12)): "A FOREST GREEN THREAD SNAGGED ON THE GATE"
    3 × 1 = 3 (A) · 8 × 8 = 64 (O) · 3 × 4 = 12 (D) · 7 × 7 = 49 (S) · 1 × 1 = 1 (N) · 4 × 1 = 4 (G) · 3 × 11 = 33 (F) · 2 × 3 = 6 (R) · 3 × 7 = 21 (H) · 10 × 11 = 110 (E) · 2 × 5 = 10 (T)
  5. Clue 5 (Missing addends): surviving statement (box 11) → Zion
    2 + ___ = 11 = 9 · 6 + ___ = 11 = 5 · 6 + ___ = 7 = 1 · 4 + ___ = 12 = 8 · 3 + ___ = 13 = 10 · 10 + ___ = 13 = 3 · 1 + ___ = 5 = 4 · 3 + ___ = 15 = 12 · 10 + ___ = 12 = 2 · 9 + ___ = 15 = 6 · 9 + ___ = 16 = 7

About this mystery

Grade level
Grade 1 math
Math topics
Subtraction, Addition, Place value, Multiplication, Missing addends
Reading level
grades 1-2
Theme
The Camp Grizzly Valley Mystery — set in Camp Grizzly Valley
Format
Interactive online & printable worksheet with answer key
Solution
One unique, verified culprit among 21 suspects

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