We have hundreds of course questions with personalized recommendations + Account 100% premium
To solve the problem , we will perform decimal subtraction:
Therefore, the correct answer is: .
12.3
Choose the correct writing form:
Lining up decimal points ensures you're subtracting like place values: tenths from tenths, ones from ones, etc. Without proper alignment, you'll subtract wrong digits and get incorrect results.
Add zeros to make them the same length! For example, if subtracting 15.8 - 3.25, write it as 15.80 - 3.25. This makes alignment easier and prevents mistakes.
Always subtract from right to left, starting with the rightmost decimal place (like hundredths, then tenths). This follows the same pattern as whole number subtraction.
Use addition to check! Add your answer to the number you subtracted. If you get the original number, your subtraction is correct. For example: 12.3 + 3.5 should equal 15.8.
Borrowing works the same way! You can borrow from the ones place to the tenths place, or from tenths to hundredths. The decimal point doesn't stop the borrowing process.
Get unlimited access to all 18 Decimal Fractions - Advanced questions, detailed video solutions, and personalized progress tracking.
Unlimited Video Solutions
Step-by-step explanations for every problem
Progress Analytics
Track your mastery across all topics
Ad-Free Learning
Focus on math without distractions
No credit card required • Cancel anytime