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Ravi simplified 40 − (15 − 6) and wrote 40 − 15 − 6 = 19. What is the correct value?

Class 7Integer Expressions with BracketsIntegers
  • A19; Ravi is right
  • B21; subtract 19 from 40
  • C49; add all three
  • D31; the −6 should become +6

Step-by-Step Solution

Removing a bracket after a minus sign changes every sign inside: 40 − 15 + 6 = 31. Check: 15 − 6 = 9 and 40 − 9 = 31.
Answer: D) 31; the −6 should become +6

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