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Sum of – 30 and – 12 is
  • a)
    -42
  • b)
    42
  • c)
    -18
  • d)
    18
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Sum of – 30 and – 12 isa)-42b)42c)-18d)18Correct answer is...
= ( -30) + (-12)
= -30 - 12
= -42 
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Most Upvoted Answer
Sum of – 30 and – 12 isa)-42b)42c)-18d)18Correct answer is...
First I tell 2 rules. It will help you.

1. Same sign means Addition

2. Different sign means Subtraction
And put the sign of greater number whether you add or subtract. It is important.

here -30 and -12.
same sign so addition 42.
greater number is 30 it has minus .
So your answer is - 42

If for example -30 +12
different sign so subtraction. greater number is 30 it has minus.
so your answer is -18

if for example 30 +(-12)
different sign so subtraction and greater number sign is +
so your answer is 18.
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Community Answer
Sum of – 30 and – 12 isa)-42b)42c)-18d)18Correct answer is...
= ( -30) + (-12)
= -30 - 12
= -42 
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