Solve Decimal Subtraction: 13.29 - 12.13 in Vertical Format

Decimal Subtraction with Column Alignment

Solve the following exercise and circle the appropriate answer:

13.29-12.13

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Step-by-step video solution

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00:00 Solve
00:04 Missing accordingly, and we'll place
00:12 Let's reduce the 0
00:16 And this is the solution to the question

Step-by-step written solution

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1

Understand the problem

Solve the following exercise and circle the appropriate answer:

13.29-12.13

2

Step-by-step solution

Let's solve the following exercise in the correct order:

Subtract the hundredths after the decimal point:

93=6 9-3=6

Subtract the tenths after the decimal point:

21=1 2-1=1

Finally, we'll subtract the whole numbers before the decimal point accordingly:

32=1 3-2=1

11=0 1-1=0

We'll obtain the following result:

13.2912.1301.16 13.29\\-12.13\\01.16

3

Final Answer

1.16

Key Points to Remember

Essential concepts to master this topic
  • Alignment: Line up decimal points vertically before subtracting
  • Technique: Subtract column by column from right to left: 9-3=6, 2-1=1
  • Check: Add your answer to the subtracted number: 1.16 + 12.13 = 13.29 ✓

Common Mistakes

Avoid these frequent errors
  • Not aligning decimal points properly
    Don't line up numbers by their right edges like whole numbers = wrong place values! This puts tenths under hundredths and creates completely wrong answers. Always align the decimal points vertically first.

Practice Quiz

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FAQ

Everything you need to know about this question

Why do I need to line up the decimal points?

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Lining up decimal points ensures you subtract like place values: tenths from tenths, hundredths from hundredths. Without proper alignment, you'll subtract wrong digits and get incorrect answers.

What order should I subtract the digits?

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Always work from right to left! Start with the hundredths place, then tenths, then ones, then tens. This matches how we normally subtract and helps avoid mistakes.

Do I need to borrow in this problem?

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No borrowing needed here! Since 9 > 3, 2 > 1, and 3 > 2, each digit in 13.29 is greater than or equal to the corresponding digit in 12.13.

How can I check my subtraction answer?

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Use addition to check! Add your answer to the number you subtracted: 1.16+12.13=13.29 1.16 + 12.13 = 13.29 . If you get the original number, you're correct!

What if the decimal has different numbers of digits?

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Add zeros as placeholders! For example, if subtracting 12.1 from 13.29, think of 12.1 as 12.10 so both numbers have the same decimal places.

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