Comparing with multiplication: ages and heights | 4th grade | Khan Academy

TL;DR

Imran is 4 years old and the giraffe is 18 feet tall.

Transcript

We're told that Imran is two years older than Diya. Diya is 2. How old is Imran? So I encourage you to pause this video and try to think about this yourself. How old is Imran given the information here? So let's use some letters to represent Imran and Diya's age. Let's say that I is equal to Imran's age. And let's say that D is equal to Diya's age.... Read More

Key Insights

• 🔑 Word problems often require representing unknowns with variables for easier calculation.
• 🤕 Imran's age can be determined by adding 2 to Diya's age.
• 🦒 The giraffe's height is found by multiplying Shantanu's height by 3.
• 💁 Solving word problems involves translating information into mathematical equations.
• 🫥 Visualizing the information and using number lines can aid in problem-solving.
• ❓ Understanding the relationships between different elements in the problem is crucial.
• ❓ Applying basic arithmetic operations is necessary to find the solutions.

Questions & Answers

Q: How do we determine Imran's age based on the given information?

By representing Imran's age as I and Diya's age as D, we can use the given information that Imran is two years older than Diya (I = D + 2). Since Diya is 2, Imran's age is 2 + 2, which equals 4.

Q: How do we calculate the height of the giraffe?

By representing the giraffe's height as G and Shantanu's height as S, we can use the information that the giraffe is three times taller than Shantanu (G = 3S). Since Shantanu is 6 feet tall, the giraffe's height is 3 x 6, which equals 18 feet.

Summary & Key Takeaways

• The first problem involves determining Imran's age based on the information that he is two years older than Diya, who is 2 years old.

• The second problem involves finding the height of a giraffe at the zoo, which is three times taller than Shantanu's height of 6 feet.