what is 5.75 + (-2 1/8)=

You could just do it on the calclulator

$${\mathtt{5.75}}{\mathtt{\,-\,}}\left({\mathtt{2}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{1}}}{{\mathtt{8}}}}\right) = {\mathtt{3.625}}$$

paranthese first!

I assume that you have -2&1/8 (-2.125)

So a + multiplicated by a - = a minus.

So 5.75-2.125 = 3.625 (or in fraction 3-5/8)

paranthese first!

I assume that you have -2&1/8 (-2.125)

So a + multiplicated by a - = a minus.

So 5.75-2.125 = 3.625 (or in fraction 3-5/8)