Let's solve the word problem shown in the image step by step.
---
Problem Statement:
> In training, Marco runs 20 km long before he stops for a while. Then he ran again 30 km to reach the finish line.
>
How long did Marco run in total?
---
Step 1: Understand the Problem
We are given two distances that Marco ran:
- First part: 20 km
- Second part: 30 km
We need to find the
total distance he ran.
This is a
length addition problem — we’re adding two lengths together.
---
Step 2: Convert the Words into a Number Sentence
To find the total distance, we add the two parts:
$$
20\ \text{km} + 30\ \text{km} = ?
$$
---
Step 3: Perform the Addition
$$
20 + 30 = 50
$$
So,
$$
20\ \text{km} + 30\ \text{km} = 50\ \text{km}
$$
---
Final Answer:
Marco ran a total of
50 kilometers.
---
Explanation:
This is a classic example of a
word problem involving lengths. The key is identifying the operation needed — in this case,
addition, because we're combining two distances to find the total length of the journey.
The path in the image shows:
- Start → 20 km → Stop
- Stop → 30 km → Finish
Adding both segments gives the full distance from start to finish.
✔ Answer: 50 km
Parent Tip: Review the logic above to help your child master the concept of measurement word problems 2nd grade worksheet.
