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Rahul claims that any number written with a minus sign in front of it is an integer. Which example shows that he is wrong?

Class 6IntegersIntegers
  • A−7
  • B−2.5
  • C−100
  • D−1

Step-by-Step Solution

−2.5 carries a minus sign but is a decimal, not a whole number, so it is not an integer. The other three are negatives of whole numbers and are integers. A minus sign only tells you which side of zero the number is on.
Answer: B) −2.5

Key idea: Adding integers — same sign

When two integers have the **same sign**, add their absolute values and keep the sign. So 4 + 3 = 7 (both positive → result positive), and (−4) + (−3) = −7 (both negative → result negative). On the number line: same sign means you keep moving in the same direction.

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