=-25,19-74,81+17,4=17,4-100=-83,6
(-25,19)-(74,81 -17,4)
=-25,19 - 74,81 + 17,4
=(-25,19 - 74,81) + 17,4
=-100+17,4
=-82,6
\(\left(-25,19\right)-\left(74,81-17,4\right)\\ =\left(-25,19\right)-57,41\\ =\left(-25,19\right)+\left(-57,41\right)\\ =-82,6\)