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Asked to find 6 − (−4), Priya leaves it written as 6 − (−4) while Farhan rewrites it as 6 + 4. Who has written a correct expression?

Class 6IntegersIntegers
  • AOnly Priya
  • BOnly Farhan
  • CBoth — the two expressions have the same value
  • DNeither

Step-by-Step Solution

Subtracting a negative is the same as adding the opposite, so 6 − (−4) and 6 + 4 are two ways of writing one thing, and both equal 10. Farhan's rewrite is the safer form to compute with, but Priya's original is not wrong.
Answer: C) Both — the two expressions have the same value

Key idea: Subtracting integers

Subtraction of integers is just adding the **opposite**: a − b = a + (−b). So 5 − 8 = 5 + (−8) = −3. And 5 − (−8) = 5 + 8 = 13. The 'minus minus' that looks confusing in symbols is simply: subtracting a negative is the same as adding its positive twin. Always rewrite subtraction as addition of the opposite — it removes every sign-error trap.

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