00 is a commonly used international access prefix, not part of the telephone number. +232 is the country code for Sierra Leone, in western Africa. +232 22 is the city code for Freetown, the capital of Sierra Leone.
The telephone number code 003522 is associated with Portugal, specifically for the region of Madeira. The "0035" prefix indicates the country code for Portugal, while "22" is used for the specific area within Madeira. When dialing from abroad, you would use the full code, starting with the international dialing prefix.
22+22+28+28=100.
It means that it is an incorrectly formatted international phone number for somewhere in West Africa. The plus sign should be attached to the country code, but there is no country code +22. The country codes +220 through +229 are different countries. See the related question for more.
Mumbai is in area code 022, or +91 22 from outside India.
491
22
-15 plus 4 plus -22 = -33-15 + 4 = -1111 + -22 = -33
Chapter 22, page 232 - 234
- 22 + (-83) + 5 = -22 - 83 + 5 = -100
33 + 22 + 36 = 91
22 + 14 + 8 = 44