What is a Joining Word Problem (Adding)?

S1-SA1-0744

Grade Level:

Class 2

Maths, NLP, AI, Logic

Definition

What is it?

A Joining Word Problem (Adding) is a type of word problem where you combine two or more groups of things to find the total number. It's about putting things together to get a bigger quantity.

Simple Example

Quick Example

Imagine you have 5 laddoos in one box and your friend gives you 3 more laddoos. To find out how many laddoos you have in total, you would use addition. You are joining the two groups of laddoos.

Worked Example

Step-by-Step

Rohan has 7 cricket bats. His uncle gifts him 4 more cricket bats. How many cricket bats does Rohan have now?

Step 1: Understand the problem. Rohan has some bats, and he gets more. We need to find the total.
---Step 2: Identify the numbers given. Rohan starts with 7 bats. He gets 4 more bats.
---Step 3: Recognize the action. 'Gifts more' and 'how many now' tells us to join or add.
---Step 4: Write down the addition sentence: 7 + 4 = ?
---Step 5: Calculate the sum: 7 + 4 = 11.
---Answer: Rohan has 11 cricket bats now.

Why It Matters

Understanding joining word problems helps you think logically, which is key in fields like AI for problem-solving. In NLP, it's like teaching computers to understand human language and perform calculations. Even game developers use this logic to add points or resources in games.

Common Mistakes

MISTAKE: Subtracting instead of adding when words like 'more', 'total', 'altogether' are used. | CORRECTION: Look for keywords that signal joining or increasing quantities, like 'and', 'plus', 'more', 'altogether', 'in total', 'sum'.

MISTAKE: Not reading the entire problem carefully and missing key information. | CORRECTION: Read the problem at least twice. Circle the numbers and underline the question to ensure you understand what is being asked.

MISTAKE: Making calculation errors after setting up the correct addition. | CORRECTION: Double-check your addition. You can use fingers, draw pictures, or count on a number line to verify your sum.

Practice Questions

Try It Yourself

QUESTION: A vegetable seller had 12 tomatoes. He bought 8 more tomatoes from the market. How many tomatoes does he have in total? | ANSWER: 12 + 8 = 20 tomatoes

QUESTION: In a school bus, there are 15 girls and 13 boys. How many students are there in the bus altogether? | ANSWER: 15 + 13 = 28 students

QUESTION: Pooja collected 24 stickers. Her brother gave her 10 more stickers, and then her friend gave her 5 stickers. What is the total number of stickers Pooja has now? | ANSWER: 24 + 10 + 5 = 39 stickers

MCQ

Quick Quiz

Which operation would you use to solve this problem: 'There are 6 red roses and 7 yellow roses in a garden. How many roses are there in all?'

Subtraction

Addition

Multiplication

Division

The Correct Answer Is:

The phrase 'in all' indicates that you need to combine the groups of red and yellow roses, which means using addition.

Real World Connection

In the Real World

When you buy groceries, the billing machine at the shop adds up the prices of all items you bought to give you the total bill. This is a real-world example of joining different amounts (prices) through addition. Similarly, when a delivery app like Swiggy calculates the total cost of your order, it adds food price, delivery fees, and taxes.

Key Vocabulary

Key Terms

ADDITION: The process of combining two or more numbers to find their total sum | SUM: The result obtained when numbers are added together | TOTAL: The entire amount or number | WORD PROBLEM: A math problem presented in text form, requiring understanding of language to solve | JOINING: Putting things together to form a larger group

What's Next

What to Learn Next

Next, you can explore 'Separating Word Problems (Subtracting)'. This will teach you how to find out how many are left when some items are taken away, which is the opposite of joining.