Add Five-Digit Numbers: 81541 + 17759 Addition Problem

Five-Digit Addition with Carrying

81541+17759776 \begin{aligned} &81541\\ +& \\ &17759 \\ &\underline{\phantom{776}} & \\ \end{aligned}

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:08 Let's solve this step by step.
00:11 First, we combine each pair of digits.
00:15 Starting with the ones. Combine ones with ones.
00:19 Place the result in the ones column. If there's a carry over, add it to the tens.
00:25 Next, combine tens with tens.
00:31 Put the tens result in the tens place. Add any carry to the hundreds.
00:37 Now, combine hundreds with hundreds.
00:41 Place in the hundreds column and add any carry to the thousands.
00:46 Then, combine thousands with thousands. Include the carry.
00:52 Place the result in the thousands.
00:56 Finally, combine tens of thousands with tens of thousands.
01:01 And that's how we solve this problem!

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

81541+17759776 \begin{aligned} &81541\\ +& \\ &17759 \\ &\underline{\phantom{776}} & \\ \end{aligned}

2

Step-by-step solution

To solve this problem, we'll follow these steps:

  • Step 1: Arrange the numbers vertically and align by the rightmost digit.
  • Step 2: Add digits starting from the right (units place) and move left.
  • Step 3: Carry over any value over 9 to the next set of digits.

Now, let's work through each step:

Step 1: Arrange the numbers:

+81541++17759 \begin{aligned} &\phantom{+}81541 \\ + &\phantom{+}17759 \\ \end{aligned}

Step 2: Add digits starting from the rightmost digit:

  1. Units place: 1+9=101 + 9 = 10. Write down 0 and carry over 1.
  2. Tens place: 4+5=94 + 5 = 9. Add the carried 1: 9+1=109 + 1 = 10. Write down 0 and carry over 1.
  3. Hundreds place: 5+7=125 + 7 = 12. Add the carried 1: 12+1=1312 + 1 = 13. Write down 3 and carry over 1.
  4. Thousands place: 1+7=81 + 7 = 8. Add the carried 1: 8+1=98 + 1 = 9. Write down 9.
  5. Ten-thousands place: 8+1=98 + 1 = 9. Write down 9.

The addition will look like this:

881541+817759899300 \begin{aligned} &\phantom{8}81541 \\ + &\phantom{8}17759 \\ \hline &\phantom{8}99300 \\ \end{aligned}

Therefore, the addition of these two numbers results in 9930099300.

3

Final Answer

99300

Key Points to Remember

Essential concepts to master this topic
  • Rule: Always add digits column by column from right to left
  • Technique: When sum exceeds 9, write units digit and carry tens: 1+9=10, write 0 carry 1
  • Check: Verify each column addition including carried values: 81541+17759=99300 ✓

Common Mistakes

Avoid these frequent errors
  • Forgetting to add carried values to the next column
    Don't just add the original digits without including carries = wrong final answer! In the tens place, 4+5=9, but you must add the carried 1 to get 10. Always remember to include every carried value in your next column calculation.

Practice Quiz

Test your knowledge with interactive questions

\( \begin{aligned} &83 \\ +& \\ &~~6 \\ &\underline{\phantom{776}} & \\ \end{aligned} \)

FAQ

Everything you need to know about this question

Why do I need to carry when adding?

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Carrying happens when the sum in any column is 10 or greater. Since each place value can only hold digits 0-9, we write the units digit and carry the tens digit to the next column.

What if I forget to carry a number?

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Your final answer will be wrong! Always write down small carry numbers above each column to remind yourself. For example, write the carried 1 above the tens column.

How do I know if I carried correctly?

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Check each column step by step: Units: 1+9=10 (write 0, carry 1), Tens: 4+5+1=10 (write 0, carry 1), and so on. Each carried value must be included!

Can I add from left to right instead?

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No! Always add from right to left (units to ten-thousands). This ensures you handle carrying correctly, since carries always move to the left.

What happens if there's a carry from the leftmost column?

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If the leftmost column sum is 10 or more, you create a new leftmost digit. For example, if 8+1 was 18, your answer would start with 1, making it a six-digit number.

How can I double-check my addition?

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Try adding the numbers in reverse order (17759+81541) or use estimation: 82000+18000≈100000, so 99300 makes sense!

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