Question

explain that how 1+1=2​

Answer 1

Answer:

because of adding the digits

Answer 2

Answer:

phone no.

Step-by-step explanation:

The Principia Mathematica (often abbreviated PM) is a three-volume work on the foundations of mathematics written by the mathematicians Alfred North Whitehead and Bertrand Russell and published in 1910, 1912, and 1913. In 1925–27, it appeared in a second edition with an important Introduction to the Second Edition, an Appendix A