To simplify the expression, we can first simplify each of the square roots individually:

√1.25 = √(1.25) = 1.118

√80 = √(16 5) = √16 √5 = 4√5

1/14√245 = (1/14) √245 ≈ 0.105 15.65 ≈ 1.64

√180 = √(36 5) = √36 √5 = 6√5

Now we can plug these values back into the expression and simplify further:

1.118 + 4√5 - 1.64 - 6√5
= (1.118 - 1.64) + (4√5 - 6√5)
= -0.522 - 2√5

Therefore, √1.25 + √80 - 1/14√245 - √180 simplifies to -0.522 - 2√5.