Grade 4Reading: grades 1-2RoundingAdditionSubtractionMultiplicationDivision

The Treehouse Raider

Oh no! The Golden Spyglass is missing from the Treehouse Club. A sneaky Treehouse Raider took it! We must find out who did it before the sun goes down.

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	Club Badge	Pocket Tool	Write Hand	Hair Color	Fear
Luke	leaf badge	rope	right handed	neat brown hair	scared of spiders
Zoe	crown badge	chalk	left handed	neat brown hair	scared of frogs
Eli	star badge	chalk	left handed	wild red hair	scared of frogs
Max	leaf badge	magnifier	right handed	neat brown hair	scared of frogs
Sora	crown badge	chalk	right handed	messy yellow hair	scared of spiders
Leo	star badge	chalk	left handed	neat brown hair	scared of bees
Nova	leaf badge	magnifier	left handed	neat brown hair	scared of frogs
Finn	leaf badge	flashlight	left handed	messy yellow hair	scared of frogs
Ella	star badge	whistle	left handed	wild red hair	scared of bees
Ruby	map badge	chalk	right handed	messy yellow hair	scared of bees
Toby	star badge	chalk	right handed	messy yellow hair	scared of bees
Ava	owl badge	chalk	right handed	neat brown hair	scared of bees
Cora	leaf badge	flashlight	left handed	wild red hair	scared of spiders
Roy	leaf badge	flashlight	right handed	neat brown hair	scared of spiders
Ben	star badge	chalk	right handed	wild red hair	scared of bees
Sam	owl badge	chalk	left handed	neat brown hair	scared of frogs
Hugo	star badge	rope	left handed	messy yellow hair	scared of frogs
Otis	crown badge	flashlight	left handed	neat brown hair	scared of spiders
Ivy	crown badge	rope	left handed	neat brown hair	scared of frogs
Lily	crown badge	rope	left handed	wild red hair	scared of frogs
Joy	leaf badge	whistle	left handed	neat brown hair	scared of frogs

Clue 1

Rounding

We found a broken walkie talkie. The screen shows a rounded number of steps.

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

200

3700

500

300

430

5000

300

4300

3000

500

2900

4300

3000

200

370

5000

2300

170

5000

2000

3700

300

2900

200

430

500

Round 196 to the nearest hundredT

Round 432 to the nearest tenL

Round 3,701 to the nearest hundredH

Round 4,543 to the nearest thousandA

Round 89 to the nearest tenD

Round 369 to the nearest tenC

Round 261 to the nearest hundredI

Round 4,330 to the nearest hundredN

Round 3,009 to the nearest thousandO

Round 19 to the nearest tenV

Round 498 to the nearest hundredE

Round 2,932 to the nearest hundredS

Round 1,630 to the nearest thousandW

Round 2,347 to the nearest hundredR

Round 169 to the nearest tenY

0/15 letters found

Clue 2

Addition

We need to add up all the map pieces. Let us count how many we have.

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

5810

3699

4614

7756

5230

8602

3009

5810

9238

7283

6673

4614

3857

6344

8602

5810

4614

2634

3857

8602

5810

3699

5810

3699

4614

8602

6344

3009

4614

8762

5810

3699

6790

6673

6581

1754 + 4056 =T

4825 + 3777 =I

1305 + 2394 =H

2904 + 2326 =U

1070 + 1564 =S

2003 + 2611 =E

1851 + 2006 =W

5235 + 2521 =G

2203 + 4378 =D

5663 + 3575 =Y

1970 + 4374 =R

4929 + 3833 =F

2106 + 903 =L

4746 + 2044 =A

3836 + 2837 =N

3481 + 3802 =O

0/16 letters found

Clue 3

Subtraction

The Raider dropped some juice boxes. We must find out how many 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.

7159

8447

3094

5347

1591

7984

6252

5347

1591

2197

4401

4898

2402

4401

6447

5661

6303

4898

2402

1591

6585

2197

4401

7984

7379

2197

8447

6585

9368 - 2209 =Y

5181 - 283 =T

8164 - 180 =N

5485 - 3083 =H

5839 - 2745 =U

10832 - 4529 =I

5763 - 102 =W

11921 - 3474 =O

8563 - 2311 =S

6465 - 2064 =E

1744 - 153 =A

6440 - 1093 =C

3450 - 1253 =R

9430 - 2983 =M

8936 - 1557 =F

8771 - 2186 =G

0/16 letters found

Clue 4

Multiplication facts (1-12)

Look at the rows of muddy footprints. We can multiply to count them fast.

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

110

120

132

110

100

120

110

132

12 × 8 =B

11 × 10 =N

2 × 11 =C

12 × 3 =H

7 × 7 =I

10 × 10 =D

7 × 5 =A

6 × 8 =E

8 × 11 =W

7 × 4 =O

12 × 11 =T

10 × 12 =S

5 × 3 =R

0/13 letters found

Clue 5

Division facts (1-12) — the last clue

We want to share our sweet berries evenly. Let us divide them up.

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

63 ÷ 7 = ?

24 ÷ 6 = ?

24 ÷ 8 = ?

110 ÷ 10 = ?

88 ÷ 11 = ?

36 ÷ 3 = ?

20 ÷ 4 = ?

12 ÷ 6 = ?

5 ÷ 5 = ?

28 ÷ 4 = ?

54 ÷ 9 = ?

Step 2 — cross out the sentence with each answer

1.The villain sneaked through the hollow log, then spilled some sweet berry juice.

2.The villain slid down the muddy zipline, then spilled some sweet berry juice.

3.The villain scrambled over the wooden fence, then left muddy footprints on the deck.

4.The villain crept across the swinging bridge, then dropped a shiny club coin.

5.The villain scrambled over the wooden fence, then dropped a shiny club coin.

6.The villain slid down the muddy zipline, then tipped over the scout bucket.

7.The villain crept across the swinging bridge, then spilled some sweet berry juice.

8.The villain climbed up the big rope ladder, then lost a secret map sheet.

9.The villain sneaked through the hollow log, then lost a secret map sheet.

10.The villain crept across the swinging bridge, then left muddy footprints on the deck.

11.The villain sneaked through the hollow log, then dropped a shiny club coin.

12.The villain slid down the muddy zipline, then lost a secret map sheet.

Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — The Treehouse Raider

Culprit: Zoe (crown badge · chalk · left handed · neat brown hair · scared of frogs)

Clue 1 (Rounding): "THE VILLAIN DOES NOT CARRY A WHISTLE"
Round 196 to the nearest hundred = 200 (T) · Round 432 to the nearest ten = 430 (L) · Round 3,701 to the nearest hundred = 3700 (H) · Round 4,543 to the nearest thousand = 5000 (A) · Round 89 to the nearest ten = 90 (D) · Round 369 to the nearest ten = 370 (C) · Round 261 to the nearest hundred = 300 (I) · Round 4,330 to the nearest hundred = 4300 (N) · Round 3,009 to the nearest thousand = 3000 (O) · Round 19 to the nearest ten = 20 (V) · Round 498 to the nearest hundred = 500 (E) · Round 2,932 to the nearest hundred = 2900 (S) · Round 1,630 to the nearest thousand = 2000 (W) · Round 2,347 to the nearest hundred = 2300 (R) · Round 169 to the nearest ten = 170 (Y)
Clue 2 (Addition): "THE GUILTY ONE WRITES WITH THEIR LEFT HAND"
1754 + 4056 = 5810 (T) · 4825 + 3777 = 8602 (I) · 1305 + 2394 = 3699 (H) · 2904 + 2326 = 5230 (U) · 1070 + 1564 = 2634 (S) · 2003 + 2611 = 4614 (E) · 1851 + 2006 = 3857 (W) · 5235 + 2521 = 7756 (G) · 2203 + 4378 = 6581 (D) · 5663 + 3575 = 9238 (Y) · 1970 + 4374 = 6344 (R) · 4929 + 3833 = 8762 (F) · 2106 + 903 = 3009 (L) · 4746 + 2044 = 6790 (A) · 3836 + 2837 = 6673 (N) · 3481 + 3802 = 7283 (O)
Clue 3 (Subtraction): "YOU CAN SCARE THEM WITH A GREEN FROG"
9368 - 2209 = 7159 (Y) · 5181 - 283 = 4898 (T) · 8164 - 180 = 7984 (N) · 5485 - 3083 = 2402 (H) · 5839 - 2745 = 3094 (U) · 10832 - 4529 = 6303 (I) · 5763 - 102 = 5661 (W) · 11921 - 3474 = 8447 (O) · 8563 - 2311 = 6252 (S) · 6465 - 2064 = 4401 (E) · 1744 - 153 = 1591 (A) · 6440 - 1093 = 5347 (C) · 3450 - 1253 = 2197 (R) · 9430 - 2983 = 6447 (M) · 8936 - 1557 = 7379 (F) · 8771 - 2186 = 6585 (G)
Clue 4 (Multiplication facts (1-12)): "BROWN HAIR STRANDS WERE ON THE CHAIR"
12 × 8 = 96 (B) · 11 × 10 = 110 (N) · 2 × 11 = 22 (C) · 12 × 3 = 36 (H) · 7 × 7 = 49 (I) · 10 × 10 = 100 (D) · 7 × 5 = 35 (A) · 6 × 8 = 48 (E) · 8 × 11 = 88 (W) · 7 × 4 = 28 (O) · 12 × 11 = 132 (T) · 10 × 12 = 120 (S) · 5 × 3 = 15 (R)
Clue 5 (Division facts (1-12)): surviving statement (box 10) → Zoe
63 ÷ 7 = 9 · 24 ÷ 6 = 4 · 24 ÷ 8 = 3 · 110 ÷ 10 = 11 · 88 ÷ 11 = 8 · 36 ÷ 3 = 12 · 20 ÷ 4 = 5 · 12 ÷ 6 = 2 · 5 ÷ 5 = 1 · 28 ÷ 4 = 7 · 54 ÷ 9 = 6

About this mystery

Grade level: Grade 4 math
Math topics: Rounding, Addition, Subtraction, Multiplication, Division
Reading level: grades 1-2
Theme: The Treehouse Raider — set in The Great Forest Treehouse
Format: Interactive online & printable worksheet with answer key
Solution: One unique, verified culprit among 21 suspects

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