Answer:
-22
Explanation:
(-18)-(4)
We apply the rule of sign when we add or subtract the numbers.
When the signs of two numbers are same then we add the numbers and put the same sign. When the signs of two numbers are not same then we subtract the numbers and put the sign of greatest number.
![(-18)-(4)](https://img.qammunity.org/2019/formulas/mathematics/high-school/csz7ro1tkigaxjt7zka4nlj5qe6s2kutt7.png)
negative and positive becomes negative
![-18-4](https://img.qammunity.org/2019/formulas/mathematics/high-school/fw8e0w63bvorij30qma4kyvl22b3ht1hmv.png)
The signs are same so we add the numbers and put the same sign.
![-22](https://img.qammunity.org/2019/formulas/mathematics/high-school/tw7mat5bhxt8kzsviu0isr096n434qh0dz.png)