Calculate the Sum: Finding 3550 + 1100 Step by Step

Q: Why do I need to align the numbers by place value?

Place value alignment ensures you're adding units to units, tens to tens, hundreds to hundreds, etc. Without proper alignment, you might accidentally add a tens digit to a hundreds digit, giving you the wrong answer!

Q: What if I get confused about which column to start with?

Always start from the rightmost column (units place) and work your way left. This follows the natural flow of carrying over digits when needed, just like counting!

Q: Do I always need to write the problem vertically?

While you can add horizontally, writing vertically makes it much easier to keep track of place values and avoid mistakes, especially with larger numbers like $ 3550 + 1100 $.

Q: How can I double-check my answer without doing the same calculation?

Try adding in reverse order: instead of 3550 + 1100, calculate 1100 + 3550. You can also use estimation: 3550 ≈ 3600, 1100 stays the same, so expect around 4700.

Q: What should I do if I get a different answer than the choices?

Go back and check your place value alignment and column addition. Make sure you didn't skip any digits or mix up the order. Most errors come from rushing through the alignment step!

Addition with Multi-Digit Numbers

Calculate:

$3550+1100=$

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Step-by-step written solution

Follow each step carefully to understand the complete solution

Understand the problem

Calculate:

$3550+1100=$

Step-by-step solution

To solve the addition problem $3550 + 1100$ , let's follow these steps:

Step 1: Align the numbers by their place values. Write $3550$ on top and $1100$ below it, such that the units digits are in the same column.
Step 2: Add the digits in the units place (rightmost column). Since both are zero, their sum is zero.
Step 3: Move to the tens place. Again, both digits are zero, so this also sums to zero. Write 0 in the tens place of the result.
Step 4: Add the hundreds place. The digit 5 from $3550$ and 1 from $1100$ gives us 6. Write 6 in the hundreds place.
Step 5: Lastly, move to the thousands place. Adding 3 and 1 gives 4. Write 4 in the thousands place.

Thus, $3550 + 1100 = 4650$ .

The correct choice from the provided options is Choice 4.

Final Answer

$4650$

Key Points to Remember

Essential concepts to master this topic

Place Value Rule: Align digits by place value before adding
Column Addition: Start from rightmost column: 0+0=0, 5+1=6, 3+1=4
Verification: Check by adding in reverse order: 1100+3550=4650 ✓

Common Mistakes

Avoid these frequent errors

Misaligning place values when setting up the problem
Don't write numbers randomly without considering place values = wrong alignment leads to incorrect sums! When digits aren't properly aligned by place value, you end up adding tens to hundreds or units to tens. Always line up the rightmost digits first, then work left to ensure proper place value alignment.

Practice Quiz

Test your knowledge with interactive questions

Choose the correct answer:

$693+705=\text{ ?}$

FAQ

Everything you need to know about this question

Why do I need to align the numbers by place value?

Place value alignment ensures you're adding units to units, tens to tens, hundreds to hundreds, etc. Without proper alignment, you might accidentally add a tens digit to a hundreds digit, giving you the wrong answer!

What if I get confused about which column to start with?

Always start from the rightmost column (units place) and work your way left. This follows the natural flow of carrying over digits when needed, just like counting!

Do I always need to write the problem vertically?

While you can add horizontally, writing vertically makes it much easier to keep track of place values and avoid mistakes, especially with larger numbers like $3550 + 1100$ .

How can I double-check my answer without doing the same calculation?

Try adding in reverse order: instead of 3550 + 1100, calculate 1100 + 3550. You can also use estimation: 3550 ≈ 3600, 1100 stays the same, so expect around 4700.

What should I do if I get a different answer than the choices?

Go back and check your place value alignment and column addition. Make sure you didn't skip any digits or mix up the order. Most errors come from rushing through the alignment step!

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