Mathematical Notation: When Can You Omit the Minus Sign?

Mathematical Signs with Positional Notation Rules

The minus sign can be omitted

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Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

The minus sign can be omitted

2

Step-by-step solution

The sign cannot be omitted as it determines whether the number will be negative or positive.

3

Final Answer

Not true

Key Points to Remember

Essential concepts to master this topic
  • Rule: Minus signs are essential parts of mathematical expressions
  • Technique: Compare -5 vs 5: completely different values and meanings
  • Check: Remove minus sign and see if meaning changes ✓

Common Mistakes

Avoid these frequent errors
  • Thinking minus signs are optional decorations
    Don't treat minus signs as removable symbols = completely wrong values! A minus sign changes -7 to +7, giving opposite results in all calculations. Always recognize that minus signs determine the actual value and direction of numbers.

Practice Quiz

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All negative numbers appear on the number line to the left of the number 0.

FAQ

Everything you need to know about this question

When might I think the minus sign isn't important?

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Students sometimes think minus signs are just symbols that don't affect the math. But -3 and +3 are completely different numbers! One goes left on the number line, the other goes right.

What happens if I accidentally drop a minus sign?

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You'll get the opposite answer! For example, if the correct answer is -8, dropping the minus gives +8, which is 16 units away from the right answer on the number line.

Are there any cases where minus signs can be ignored?

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Never! Minus signs always matter in mathematics. They indicate direction, value, and sign. Even in advanced math, every minus sign has a specific purpose and meaning.

How can I remember to keep track of minus signs?

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Think of minus signs as part of the number itself. Write them clearly and double-check each step. When in doubt, ask: 'Does this number go left or right on the number line?'

What's the difference between subtraction and negative signs?

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Great question! In 53 5 - 3 , the minus is subtraction. In 3 -3 , it's a negative sign showing the number's value. Both are crucial and cannot be omitted!

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