Solve: 4.5 + 12.5 + 10.5 - 13.5 Sequential Decimal Operations

Sequential Addition and Subtraction with Decimals

4.5+12.5+10.513.5=? 4.5+12.5+10.5-13.5=\text{?}

❤️ Continue Your Math Journey!

We have hundreds of course questions with personalized recommendations + Account 100% premium

Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:09 To solve addition and subtraction, go from left to right.

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

4.5+12.5+10.513.5=? 4.5+12.5+10.5-13.5=\text{?}

2

Step-by-step solution

Let's solve the exercise from left to right since we are only dealing with addition and subtraction operations:

4.5+12.5=17 4.5+12.5=17

17+10.5=27.5 17+10.5=27.5

27.513.5=14 27.5-13.5=14

3

Final Answer

14 14

Key Points to Remember

Essential concepts to master this topic
  • Order: Work from left to right for addition and subtraction
  • Technique: Group: (4.5 + 12.5 + 10.5) - 13.5 = 27.5 - 13.5
  • Check: Verify by adding negatives: 4.5 + 12.5 + 10.5 + (-13.5) = 14 ✓

Common Mistakes

Avoid these frequent errors
  • Adding all numbers and ignoring the subtraction sign
    Don't add 4.5 + 12.5 + 10.5 + 13.5 = 40.5! This treats subtraction as addition and gives a completely wrong result. Always pay careful attention to operation signs and work left to right.

Practice Quiz

Test your knowledge with interactive questions

\( 100+5-100+5 \)

FAQ

Everything you need to know about this question

Do I have to work strictly from left to right?

+

For addition and subtraction only, yes! Unlike multiplication and division, these operations must be done in order from left to right to get the correct answer.

Can I group the addition parts together first?

+

Absolutely! You can add 4.5+12.5+10.5=27.5 4.5 + 12.5 + 10.5 = 27.5 first, then subtract 13.5. This makes the calculation easier while following the same left-to-right rule.

What if I get confused with the decimal points?

+

Line up the decimal points vertically when adding or subtracting! This helps you keep track of tenths, hundredths, and whole numbers in their proper places.

How can I double-check my work?

+

Try the calculation a different way: 4.5+12.5+10.513.5 4.5 + 12.5 + 10.5 - 13.5 equals 4.5+12.5+10.5+(13.5) 4.5 + 12.5 + 10.5 + (-13.5) . Both methods should give you 14.

Why is my answer a whole number when I started with decimals?

+

That's perfectly normal! The decimal parts can add up to whole numbers. In this case, 0.5 + 0.5 + 0.5 - 0.5 = 1.0, which combines with the whole number parts to give 14.

🌟 Unlock Your Math Potential

Get unlimited access to all 18 The Order of Operations 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

More Questions

Click on any question to see the complete solution with step-by-step explanations