What is 7 + 8?

S1-SA1-0654

Grade Level:

Class 1

Maths, Computing, AI

Definition

What is it?

7 + 8 is an addition problem asking you to combine two numbers, 7 and 8, to find their total sum. Addition means joining collections of items together to see how many there are in all.

Simple Example

Quick Example

Imagine you have 7 laddus and your friend gives you 8 more laddus. To find out how many laddus you have in total, you would add 7 and 8 together.

Worked Example

Step-by-Step

Let's calculate 7 + 8 using a number line.
1. Start at the number 7 on the number line.
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2. You need to add 8 to 7, so you will make 8 jumps forward from 7.
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3. Jump 1: From 7 to 8
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4. Jump 2: From 8 to 9
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5. Jump 3: From 9 to 10
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6. Jump 4: From 10 to 11
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7. Jump 5: From 11 to 12
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8. Jump 6: From 12 to 13
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9. Jump 7: From 13 to 14
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10. Jump 8: From 14 to 15
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The final number you land on is 15. So, 7 + 8 = 15.

Why It Matters

Understanding addition is the very first step in maths, crucial for everything from basic calculations to advanced problem-solving. It's used by software developers to count data, by AI engineers to process numbers, and by data scientists to sum up information.

Common Mistakes

MISTAKE: Counting only up to 7 or 8 instead of continuing to count the sum. For example, saying 7 + 8 = 8 because they stopped counting at 8. | CORRECTION: Always start counting from the first number and add the second number by counting forward.

MISTAKE: Mixing up addition with subtraction. Forgetting to count forward and instead counting backward. | CORRECTION: Remember that the '+' sign means to add, which always makes the total number bigger.

MISTAKE: Not counting all the jumps when using a number line or fingers. Forgetting one jump or counting one jump twice. | CORRECTION: Double-check your counting. Mark each jump clearly on a number line or use your fingers carefully.

Practice Questions

Try It Yourself

QUESTION: You scored 7 runs in the first over of a cricket match and 8 runs in the second over. How many runs did you score in total? | ANSWER: 15 runs

QUESTION: If a shopkeeper sells 7 red pens and 8 blue pens, how many pens did he sell altogether? | ANSWER: 15 pens

QUESTION: Riya had 7 stickers. Her brother gave her 5 more stickers, and then her sister gave her 3 more. How many stickers does Riya have now? (Hint: Add 7+5 first, then add 3 to that answer) | ANSWER: 15 stickers

MCQ

Quick Quiz

What is the sum of 7 and 8?

The Correct Answer Is:

When you add 7 and 8 together, you combine them to get a total of 15. Options A, B, and D are incorrect sums.

Real World Connection

In the Real World

When you use a digital payment app like UPI to send money, the app calculates totals. If you pay 7 rupees for a samosa and 8 rupees for chai, the app adds these two amounts to show your total bill as 15 rupees.

Key Vocabulary

Key Terms

ADDITION: The process of combining numbers to find their sum | SUM: The result of adding two or more numbers together | TOTAL: The complete amount or number of something | NUMBER LINE: A straight line with numbers placed at equal intervals along its length

What's Next

What to Learn Next

Now that you've mastered 7 + 8, you're ready to explore adding bigger numbers and even three numbers together! This will help you solve more complex problems in daily life and in your studies.