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Hope my answer helps you...
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this is the integer chapter
3+24+18-25 +12 for this you have to know the formula
1 ) (-x-) = + 2) +x+ = + 3 ) + x - = --
Formula's ex: 1, 2 and 3
-2 + (-4) = -2-4 -6
We write here -6 because 4 is bigger so its sign will also bigger.
Q 1. sol-- 3+24+18-25 +12
= 27 +18-25 +12
= 27+18+12-25
= 57-25
= 30 .
Q 2 . Sol -- 19-13+19-25
= 38-13-25
= 38-38
= 0
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