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What is 1 + 2?
Grade Level:
Class 1
Maths, Computing, AI
Definition
What is it?
1 + 2 is a basic addition problem where you combine the value of '1' and '2' to find their total sum. It helps us understand how numbers grow when put together.
Simple Example
Quick Example
Imagine you have 1 yummy gulab jamun. Your friend gives you 2 more gulab jamuns. How many gulab jamuns do you have now in total? You add 1 and 2 to find out.
Worked Example
Step-by-Step
Let's find the answer to 1 + 2:
1. Start with the first number, which is 1.
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2. Now, we need to add the second number, which is 2.
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3. You can count forward from 1, two times. So, 1... (count 1) is 2... (count 2) is 3.
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4. So, 1 + 2 means combining one item with two items.
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5. When you combine them, you get a total of three items.
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Answer: 1 + 2 = 3
Why It Matters
Understanding addition like 1 + 2 is the very first step in maths, which is crucial for computing and even AI. Engineers use addition to calculate how much material is needed for a building, and computer programmers use it to write code for games and apps.
Common Mistakes
MISTAKE: Confusing addition with subtraction (e.g., thinking 1 + 2 is the same as 2 - 1). | CORRECTION: Remember addition means 'putting together' or 'finding the total', while subtraction means 'taking away' or 'finding the difference'.
MISTAKE: Counting incorrectly and getting 4 or 2 as the answer. | CORRECTION: Always double-check your counting. Start with the first number and count forward the number of steps indicated by the second number.
MISTAKE: Thinking that adding 0 changes the number (e.g., 1 + 0 = 3). | CORRECTION: Remember that adding 0 to any number keeps the number the same. 1 + 0 is 1.
Practice Questions
Try It Yourself
QUESTION: You have 1 cricket bat. Your friend has 2 cricket balls. If you combine them, how many items are there in total? | ANSWER: 3 items
QUESTION: Your mom gives you 1 rupee coin. Your dad gives you 2 rupee coins. How much money do you have in total? | ANSWER: 3 rupees
QUESTION: A small auto-rickshaw has 1 driver. It picks up 2 passengers. How many people are in the auto-rickshaw in total? | ANSWER: 3 people
MCQ
Quick Quiz
What is the result of adding 1 and 2?
1
2
3
4
The Correct Answer Is:
C
When you combine 1 item with 2 items, you get a total of 3 items. So, 1 + 2 = 3.
Real World Connection
In the Real World
From calculating the total cost of your favourite snacks at the local kirana store (1 pack of chips + 2 chocolates) to keeping score in a gully cricket match, addition like 1 + 2 is used every single day. Even your mobile phone's battery percentage and data usage involve simple additions and subtractions.
Key Vocabulary
Key Terms
ADDITION: The process of combining numbers to find their total sum | SUM: The total result obtained when numbers are added together | COUNTING: The act of determining the total number of objects in a group | TOTAL: The whole amount or number.
What's Next
What to Learn Next
Great job understanding 1 + 2! Next, you can explore adding slightly bigger numbers like 2 + 3 or 5 + 1. These build on the same simple idea of combining numbers and will make you even better at mental math.
