Solve the Sequential Operation: 450-450+1 Step by Step

Q: Why can't I just do 450 + 1 - 450?

You must follow order of operations! When operations have the same priority (addition and subtraction), work left to right. Rearranging changes the sequence and can give wrong answers.

Q: Doesn't 450 - 450 equal 0, so the answer should be 0?

Great start! $ 450 - 450 = 0 $ is correct, but don't forget the final step: $ 0 + 1 = 1 $. The expression isn't finished until you've performed all operations.

Q: Can I use parentheses to make this clearer?

Absolutely! You could write it as $ (450 - 450) + 1 $ to show the order. This makes it clear that subtraction happens first, giving you $ 0 + 1 = 1 $.

Q: What if the numbers were different but followed the same pattern?

The same rule applies! For any expression like $ a - a + b $, you get $ 0 + b = b $. The middle number always becomes your final answer when you have identical first two terms.

Q: How do I remember the left-to-right rule?

Think of it like reading a sentence - you go from left to right! When operations have equal priority, always work in the direction you read: left to right.

Sequential Operations with Zero Results

$450-450+1=$

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations

00:00 Solve

00:03 Any number minus itself always equals 0

00:10 Let's continue calculating, any number plus 0 equals the number itself

00:13 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution

Understand the problem

$450-450+1=$

Step-by-step solution

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

Step 1: Perform the subtraction operation.
Step 2: Perform the addition operation.

Now, let's work through each step:
Step 1: We subtract $450$ from $450$ .
This gives us:
$450 - 450 = 0$ .

Step 2: We add $1$ to the result of the subtraction.
This gives us:
$0 + 1 = 1$ .

Therefore, the solution to the problem is $1$ .

Final Answer

Key Points to Remember

Essential concepts to master this topic

Order Rule: Work strictly from left to right for same-priority operations
Technique: First calculate $450 - 450 = 0$ , then add 1
Check: Verify each step: 0 + 1 = 1, not 450 - 1 = 449 ✓

Common Mistakes

Avoid these frequent errors

Rearranging terms without following order of operations
Don't calculate $450 + 1 = 451$ first, then subtract 450 = wrong answer of 1! This violates left-to-right order and creates confusion. Always work sequentially: first $450 - 450 = 0$ , then $0 + 1 = 1$ .

Practice Quiz

Test your knowledge with interactive questions

$$ 2+0= $$

FAQ

Everything you need to know about this question

Why can't I just do 450 + 1 - 450?

You must follow order of operations! When operations have the same priority (addition and subtraction), work left to right. Rearranging changes the sequence and can give wrong answers.

Doesn't 450 - 450 equal 0, so the answer should be 0?

Great start! $450 - 450 = 0$ is correct, but don't forget the final step: $0 + 1 = 1$ . The expression isn't finished until you've performed all operations.

Can I use parentheses to make this clearer?

Absolutely! You could write it as $(450 - 450) + 1$ to show the order. This makes it clear that subtraction happens first, giving you $0 + 1 = 1$ .

What if the numbers were different but followed the same pattern?

The same rule applies! For any expression like $a - a + b$ , you get $0 + b = b$ . The middle number always becomes your final answer when you have identical first two terms.

How do I remember the left-to-right rule?

Think of it like reading a sentence - you go from left to right! When operations have equal priority, always work in the direction you read: left to right.

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