Answer:
The correct option is: 46.83
Step-by-step explanation:
Addition is defined as the sum or total of all the given numbers. It is one of the four arithmetic operations in mathematics and is denoted by the plus symbol (+). The sum of all the numbers is expressed by an equality sign (=).
Therefore, 1.23 + 45.6 = 46.83 , having four non-zero significant figures.