Safari Sums Slides Wild Math Safari • Day 1
🐾 Grade 4 Virtual Expedition
Fraction Building Mission
Fraction & Mixed Number Sums
🪝
Expedition Hook • Fair Share Challenge:
Baby panda Bao needs \( \frac{5}{6} \) of a giant bamboo stalk—how can rangers build and serve that exact snack using single-bite unit fractions?
🎋 Giant Bamboo 🐼
Food Model • 6 Chunks
🐼
Panda Bamboo
Decomposing Models
🦭
Otter Shells
Adding Like Denominators
🦛
Hippo Melons
Mixed Number Sums
🔥
Spiral Warm-Up: Ranger Check-In
Type answers in chat!
Q1 🦜
Unit Fraction Power
Fraction for ONE equal part:
?
Your Answer: ________
Q2 🦁
Whole Number Match
How many eighths make ONE whole?
Your Answer: ________
Q3 🐢
Identify Mixed Number
Count whole logs plus fraction:
1
1
\( \frac{1}{3} \)
\( \frac{1}{3} \)
0
2 Wholes 2 of 3 Shaded
Your Answer: ________
💡
Remember: The denominator tells how many equal parts make one whole!
🐼
Concept 1 • Models to Equations
Decompose a Fraction into Unit Fractions
Panda Snack: \( \frac{5}{6} \)
Bamboo Stalk Divided into 6 Equal Chunks 🎋
\( \frac{1}{6} \) 🎋
\( \frac{1}{6} \) 🎋
\( \frac{1}{6} \) 🎋
\( \frac{1}{6} \) 🎋
\( \frac{1}{6} \) 🎋
Empty
5 parts eaten by Bao the Panda Total: 5 parts out of 6
Sum of Unit Fractions Equation:
\[ \frac{5}{6} = \frac{1}{6} + \frac{1}{6} + \frac{1}{6} + \frac{1}{6} + \frac{1}{6} \]
Key Math Takeaway:
A fraction \( \frac{a}{b} \) is the sum of \( a \) copies of unit fraction \( \frac{1}{b} \).
💬
Quick Chat Check: Write \( \frac{4}{5} \) as a sum of unit fractions in chat!
🦊
Flexibility • Many Combinations
Different Ways to Decompose \( \frac{5}{6} \)
Same fraction, different sums!
Way A: Two Groups 🌿
2/6
3/6
\( \frac{5}{6} = \frac{2}{6} + \frac{3}{6} \)
Way B: Unequal 🐾
1/6
4/6
\( \frac{5}{6} = \frac{1}{6} + \frac{4}{6} \)
Way C: Three Groups 🎋
1/6
2/6
2/6
\( \frac{5}{6} = \frac{1}{6} + \frac{2}{6} + \frac{2}{6} \)
Golden Rule: Numerators add up to total numerator (\( 2+3=5 \)), while denominators stay the same!
🦭
Concept 2 • Combining Parts
Adding Fractions with Like Denominators
Sea Otter Clam Feast
Eighths Basket Model (\( \frac{1}{8} \) each)
Morning Catch: \( \frac{3}{8} \)
1/8
1/8
1/8
Afternoon Catch: \( \frac{4}{8} \)
1/8
1/8
1/8
1/8
Combined Total: \( \frac{7}{8} \)
Addition Equation:
\[ \frac{3}{8} + \frac{4}{8} = \frac{3 + 4}{8} = \frac{7}{8} \]
Common Mistake Alert!
Do NOT add denominators! \( \frac{3}{8} + \frac{4}{8} \neq \frac{7}{16} \). The unit size remains eighths!
Waterfall Chat: If an otter eats \( \frac{2}{7} \) clams and then \( \frac{3}{7} \) clams, what is total eaten?
🦛
Concept 3 • Whole Numbers + Fractions
Represent Mixed Numbers as Sums
Hippo Crates: \( 2 \frac{1}{4} \)
Whole Crate 1
1/4
1/4
1/4
1/4
\( 1 = \frac{4}{4} \)
Whole Crate 2
1/4
1/4
1/4
1/4
\( 1 = \frac{4}{4} \)
Partial Crate 3
1/4
\( \frac{1}{4} \)
As Whole + Fraction:
\( 2 \frac{1}{4} = 1 + 1 + \frac{1}{4} \)
As Sum of Like Fractions:
\( 2 \frac{1}{4} = \frac{4}{4} + \frac{4}{4} + \frac{1}{4} = \frac{9}{4} \)
🦁
Classroom Arena • Live Chat Challenge
Safari Team Guided Practice
Ready Your Keyboards!
Mission 1 🦒 Giraffe Leaves
A giraffe ate \( \frac{2}{5} \) bin of acacia in morning and \( \frac{2}{5} \) bin at noon.
Set up the Equation:
\( \frac{2}{5} + \frac{2}{5} = \text{?} \)
Your Response: Type sum in chat 💬
Mission 2 🐘 Elephant Water
Write \( 1 \frac{3}{8} \) barrels of water as a sum of eighths.
Set up the Sum Equation:
\( 1 \frac{3}{8} = \text{?} \)
Your Response: Type full sum equation in chat 💬
📢 Poll: When adding fractions with like denominators, why does the denominator NOT change?
🎫
Day 1 Exit Ticket • Virtual Safari
Ranger Passport Clearance
Submit in Private Chat!
Check 1 🦥
Decompose
Which shows \( \frac{4}{7} \) decomposed as sum of unit fractions?
A) \( \frac{2}{7} + \frac{2}{7} \)
B) \( \frac{1}{7} + \frac{1}{7} + \frac{1}{7} + \frac{1}{7} \)
C) \( \frac{4}{1} + \frac{4}{7} \)
Check 2 🦜
Add Fractions
Find the sum:
\( \frac{3}{10} + \frac{4}{10} = \text{?} \)
A) \( \frac{7}{20} \)
B) \( \frac{7}{10} \)
C) \( \frac{12}{10} \)
Check 3 🐆
Mixed Number
Express \( 1 \frac{2}{3} \) as sum of thirds:
\( 1 \frac{2}{3} = \text{?} \)
A) \( \frac{2}{3} + \frac{2}{3} \)
B) \( \frac{1}{3} + \frac{2}{3} \)
C) \( \frac{3}{3} + \frac{2}{3} = \frac{5}{3} \)
Format response: 1-[choice], 2-[choice], 3-[choice] Great job today, Safari Explorers! 🐾 See you tomorrow!
Safari Sums Activity Sheet 🐾
Safari Sum Builders
Day 1 Student Field Journal • Fraction Decomposition & Addition
Ranger Name:
Date: Period:
🔥
Part 1: Campfire Warm-Up
1. Shade ONE unit fraction for fifths:
Unit Fraction =
2. Complete the whole fraction:
How many 8ths make 1 whole?
1 Whole = / 8
3. Name the mixed number:
1
1
Mixed Number =
🐼
Part 2: Panda Bamboo Decompositions
Decompose fractions into sums of like denominators
4. Model & Decompose \( \frac{5}{6} \) into unit fractions: Shade 5 chunks, write unit sum
Write Unit Fraction Equation: \( \frac{5}{6} = \)
5. Show TWO DIFFERENT ways to decompose \( \frac{6}{8} \) as sums of fractions:
Way 1: Sum of two fractions
Equation: \( \frac{6}{8} = \) +
Way 2: Sum of three fractions
Equation: \( \frac{6}{8} = \) + +
🦭
Part 3: Adding Fractions with Like Denominators
Add numerators, keep denominators!
6. \( \frac{2}{7} + \frac{3}{7} \)
Sum =
7. \( \frac{3}{10} + \frac{5}{10} \)
Sum =
Wild Math Safari • Day 1 Guide Turn over for Mixed Numbers & Exit Ticket ➔ Page 1 of 2
🦛
Mixed Numbers & Safari Check
Day 1 Field Journal • Part 4 & 5
Page 2
📦
Part 4: Hippo Melon Crates (Mixed Numbers)
Convert wholes into like fractions
8. Examine the model for \( 2 \frac{1}{4} \) melon crates:
Crate 1 (Whole)
\( \frac{4}{4} \)
Crate 2 (Whole)
\( \frac{4}{4} \)
Crate 3 (Partial)
\( \frac{1}{4} \)
A) Write as sum of whole numbers and a fraction: \( 2 \frac{1}{4} = \)
B) Write as sum of like fractions: \( 2 \frac{1}{4} = \)
9. Represent \( 1 \frac{3}{5} \) bins of eucalyptus leaves as a sum of fifths:
Step 1: Sketch or decompose the whole
How many fifths are in 1 whole bin?
\( 1 = \) / 5
Step 2: Complete the full sum equation
Write as sum of fifths and single fraction:
\( 1 \frac{3}{5} = \) / 5 + / 5 = / 5
🎫
Part 5: Safari Passport Exit Ticket
Jungle Subtraction Slides Wild Math Safari • Day 2
🌿 Grade 4 Virtual Expedition
Subtraction Deep Dive
Fraction & Mixed Number Subtraction
🪝
Expedition Hook • Food Supply Mystery:
A lion pride starts with \( \frac{7}{8} \) tray of food, and hungry cubs take \( \frac{3}{8} \)—how can rangers model what fraction remains without guessing?
🦁
Lion Feast
Cross-Out Models
🦒
Giraffe Regrouping
Mixed Number Models
🐆
Cheetah Path
Number Line Jumps
🔥
Spiral Warm-Up: Day 1 Review
Type answers in chat!
Q1 🐼
Like Additions
Solve: \( \frac{2}{6} + \frac{3}{6} \)
Your Answer: ________
Q2 🦭
Decompose
Which equals \( \frac{5}{8} \)?
\( \frac{2}{8} + \frac{3}{8} \text{ or } \frac{2}{4} + \frac{3}{4} \)?
Your Answer: ________
Q3 🦛
Mixed to Sum
What is \( 1 \frac{2}{5} \) as fifths?
\( \frac{5}{5} + \frac{2}{5} = \text{?} \)
Your Answer: ________
💡
Today's Big Question: How does our addition rule help us subtract like fractions?
🦁
Concept 1 • Removal Models
Subtracting Fractions with Like Denominators
Lion Pride Feast
Meat Tray in Eighths (\( \frac{1}{8} \) each) 🥩
Start with \( \frac{7}{8} \) tray. The cubs eat \( \frac{3}{8} \) .
\( \frac{1}{8} \)
\( \frac{1}{8} \)
\( \frac{1}{8} \)
\( \frac{1}{8} \)
\( \frac{1}{8} \) ✕
\( \frac{1}{8} \) ✕
\( \frac{1}{8} \) ✕
0
Removed: 3 eighths Leftover: 4 eighths
Subtraction Equation:
\[ \frac{7}{8} - \frac{3}{8} = \frac{7 - 3}{8} = \frac{4}{8} \]
The Subtraction Rule
Subtract the numerators: \( 7 - 3 = 4 \). Keep the denominator the same: 8 .
Chat Waterfall: What is \( \frac{9}{10} - \frac{4}{10} \)? Type just the fraction in chat!
🦒
Concept 2A • Mixed Numbers
Subtracting Mixed Numbers: Simple Removal
Giraffe Acacia Baskets
Whole Basket 1
Jungle Subtraction Activity Sheet 🦁
Jungle Fraction Takeaways
Day 2 Student Field Journal • Subtraction & Models
Ranger Name:
Date: Period:
🔥
Part 1: Trail Warm-Up (Day 1 Review)
1. Add like fractions:
\( \frac{2}{6} + \frac{3}{6} = \)
2. Decompose \( \frac{5}{8} \):
\( \frac{5}{8} = \) +
3. Rewrite mixed as sum:
\( 1 \frac{2}{5} = \frac{5}{5} + \) =
🥩
Part 2: Lion Pride Cross-Out Models
Cross out the subtracted parts
4. Model and solve: \( \frac{7}{8} - \frac{3}{8} \)
Seven eighths are shaded. Put an ✕ over 3 parts to represent the parts eaten.
1/8
1/8
1/8
1/8
1/8
1/8
1/8
Write Subtraction Equation: \( \frac{7}{8} - \frac{3}{8} = \)
5. Shade \( \frac{5}{6} \), then cross out \( \frac{2}{6} \) to find the difference:
Write the equation: \( \frac{5}{6} - \frac{2}{6} = \)
🦜
Part 3: Like Denominator Subtraction
Subtract numerators, keep denominator
6. \( \frac{8}{10} - \frac{3}{10} \)
Show numerator work:
\( \frac{8 - 3}{10} = \)
7. \( \frac{6}{7} - \frac{4}{7} \)
Show numerator work:
\( \frac{6 - 4}{7} = \)
8. \( \frac{11}{12} - \frac{7}{12} \)
Show numerator work:
\( \frac{11 - 7}{12} = \)
Wild Math Safari • Day 2 Guide Turn over for Mixed Numbers & Exit Ticket ➔ Page 1 of 2
🦒
Mixed Numbers & Number Lines
Day 2 Field Journal • Part 4, 5 & Exit Ticket
Page 2
📦
Part 4: Mixed Number Subtraction & Regrouping
Unpack 1 whole when needed
9. Simple Removal: \( 2 \frac{3}{4} - 1 \frac{1}{4} \)
Subtract whole numbers first, then fraction parts:
Wholes: \( 2 - 1 = \)
Fractions: \( \frac{3}{4} - \frac{1}{4} = \)
Final Difference =
10. Regrouping: \( 2 \frac{1}{5} - \frac{3}{5} \)
Unpack 1 whole into fifths (\( \frac{5}{5} \)):
Rename: \( 2 \frac{1}{5} = 1 + \) / 5 + \( \frac{1}{5} = 1 \) / 5
Subtract: \( 1 \frac{6}{5} - \frac{3}{5} = \)
Final Difference =
🐆
Part 5: Cheetah Sprint Number Line
Draw backward jump arcs
