Solve Decimal Addition: 10.6 + 4.5 Step-by-Step

Decimal Addition with Carrying Operations

10.6+4.5= 10.6+4.5=

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:05 Let's solve this problem together.
00:09 First, we'll use long addition to calculate.
00:13 Remember to place the decimal point correctly.
00:17 Start by adding the smallest digits first.
00:23 Place the units and don't forget to carry over one.
00:30 Add one to this part of the calculation and place it carefully.
00:47 Put zero in any missing places, calculate, and fill them in.
00:59 And this is how we solve the problem!

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

10.6+4.5= 10.6+4.5=

2

Step-by-step solution

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

  • Step 1: Align the numbers by their decimal points.
  • Step 2: Add the numbers starting from the right-most column.
  • Step 3: Address any carry-over if it occurs.

Now, let's work through each step:
Step 1: Write the numbers 10.610.6 and 4.54.5 one on top of the other, aligning their decimal points.
Step 2: Start adding from the right-most digit (tenths place in this case): 10.6+4.5 \begin{array}{c} 10.6 \\ + 4.5 \\ \hline \end{array}

Add the digits in the tenths column: 6+5=116 + 5 = 11. Write 11 in the tenths place and carry over 11 to the ones place.

Continue with the ones column: 0+4+10 + 4 + 1 (carry over) equals 55.

In the tens column, 1+01 + 0 equals 11.

Putting it all together, the sum is: 15.1 \begin{array}{c} 15.1 \\ \end{array}

Therefore, the solution to the problem is 15.1 15.1 .

3

Final Answer

15.1

Key Points to Remember

Essential concepts to master this topic
  • Alignment: Line up decimal points before adding any digits
  • Technique: Add 6 + 5 = 11, write 1 and carry 1
  • Check: Verify 10.6 + 4.5 = 15.1 by estimating 11 + 5 = 16 ✓

Common Mistakes

Avoid these frequent errors
  • Adding without proper decimal alignment
    Don't line up the numbers from the right like whole numbers = wrong place values! This makes 10.6 + 4.5 look like 106 + 45 = 151. Always align the decimal points first, then add column by column.

Practice Quiz

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FAQ

Everything you need to know about this question

Why do I need to align decimal points instead of lining up from the right?

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Decimal points show where the ones place ends and fractional parts begin. Aligning them ensures you're adding tenths to tenths and ones to ones, just like place value requires!

What does carrying mean when I get 6 + 5 = 11?

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When digits add up to 10 or more, you carry the extra to the next column. Write down 1 in the tenths place and carry the other 1 to the ones column, just like with whole numbers!

How can I check if 15.1 is the right answer?

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Use estimation! Round 10.6 10.6 to 11 and 4.5 4.5 to 5. Since 11+5=16 11 + 5 = 16 , your answer of 15.1 makes sense!

What if the decimal has different numbers of places?

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No problem! You can think of 4.5 4.5 as 4.50 4.50 by adding a zero. This doesn't change the value but makes alignment easier.

Why isn't the answer 14.11?

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That's the most common mistake! When you add 6 + 5 = 11, you don't write "11" in the tenths place. You write 1 and carry 1, giving you 15.1, not 14.11.

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