Hey there!
5 - 3.19
= 1.81
• To find the result of this equation you have start at 5 and go back 3.19 spaces to the left but it will be positive
OR
3.19 - 5
= -1.81
• Another way to find your result you could do is start at 5 and go back 3.19 spaces to the right but it will just give you a negative
To answer your given question (5 - 3.19) will be: 1.81
Therefore, your answer is: Option A. 1.81
Good luck on your assignment and enjoy your day!
~Amphitrite1040:)