Solve the Subtraction Equation: 7-0 = ?

Q: Why doesn't the number get smaller when I subtract?

Great question! Subtraction only makes numbers smaller when you take away something greater than zero. Since we're subtracting 0 (nothing), the original number stays the same.

Q: Is 7 - 0 the same as 0 - 7?

No! Order matters in subtraction. $ 7 - 0 = 7 $ but $ 0 - 7 = -7 $. The first number is what you start with, the second is what you take away.

Q: Does this work with any number minus zero?

Yes! This is called the Identity Property of Subtraction. Any number minus zero equals that same number: $ 15 - 0 = 15 $, $ 100 - 0 = 100 $, etc.

Q: How can I remember this rule?

Think of it like this: if you have 7 cookies and you eat zero cookies, you still have all 7 cookies! Taking away nothing means nothing changes.

Q: What if I see 0 - 7 instead?

That's different! $ 0 - 7 = -7 $ because you're starting with nothing and taking away 7, which puts you 7 below zero. Always pay attention to which number comes first!

Zero Subtraction with Whole Numbers

$7-0=$

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations

00:00 Solve

00:03 Every number minus 0 equals the number itself

00:08 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

$7-0=$

Step-by-step solution

To solve this problem, we will apply a straightforward arithmetic principle:

Identify that the subtraction operation involves zero.
Recall that subtracting zero from a number leaves the number unchanged.

Let's perform the calculation:

Given $7 - 0$ , we know from the properties of zero that subtracting zero from any number gives us the same number. Therefore:

$7 - 0 = 7$

Thus, the solution to the problem is $7$ .

Final Answer

Key Points to Remember

Essential concepts to master this topic

Identity Property: Subtracting zero from any number gives that same number
Technique: 7 - 0 means take away nothing, so 7 remains
Check: Verify that 7 - 0 = 7 by counting or using number line ✓

Common Mistakes

Avoid these frequent errors

Thinking subtraction always makes numbers smaller
Don't assume 7 - 0 must be less than 7 = wrong answer like 6! Zero is special - taking away nothing changes nothing. Always remember that subtracting zero leaves the original number unchanged.

Practice Quiz

Test your knowledge with interactive questions

$1\times1000=$

FAQ

Everything you need to know about this question

Why doesn't the number get smaller when I subtract?

Great question! Subtraction only makes numbers smaller when you take away something greater than zero. Since we're subtracting 0 (nothing), the original number stays the same.

Is 7 - 0 the same as 0 - 7?

No! Order matters in subtraction. $7 - 0 = 7$ but $0 - 7 = -7$ . The first number is what you start with, the second is what you take away.

Does this work with any number minus zero?

Yes! This is called the Identity Property of Subtraction. Any number minus zero equals that same number: $15 - 0 = 15$ , $100 - 0 = 100$ , etc.

How can I remember this rule?

Think of it like this: if you have 7 cookies and you eat zero cookies, you still have all 7 cookies! Taking away nothing means nothing changes.

What if I see 0 - 7 instead?

That's different! $0 - 7 = -7$ because you're starting with nothing and taking away 7, which puts you 7 below zero. Always pay attention to which number comes first!

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