8 + 45 + (-4 1/5) + (-1 3/4)
= 8 + 45 + (-4 - 1/5) + (-1 - 3/4)
= 8 + 45 + (-4 - 1/5) + (-1 - 3/4)
= 8 + 45 + (-4 - 1/5) + (-1 - 3/4)
= 8 + 45 - 4 - 1/5 - 1 - 3/4
= 53 - 4 - 1/5 - 1 - 3/4
= 49 - 1/5 - 3/4
= 48 4/5 - 3/4
= 48 16/20 - 15/20
= 48 1/20 or 48.05.