Explanation:

Adding integers
-The rules for adding integers with the different sign is to retain the sign of the absolute value of the bigger number, subtract the absolute value of the bigger number from the smaller number.

Subtracting integers
-To subtract an integer from another integer, the sign of the number (which is to be subtracted) should be changed and then this number with the changed sign, should be added to the first number.

Solve the following:



5. 15 + 30 =







6. 15 + (-30) =







7. 5 – 20 =







8. (-5) – (-20) =





9. |25| =





10. |-25| =





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