45
Since 0.8 is equal to 8/10ths, -0.8 is equal to -8/10ths and -0.80 is also equal to -8/10ths. If you simplify -8/10ths by dividing the numerator and the denominator by 2 you get :-4/5ths
9 10ths
450 of them because 450/10 = 45
9/10
The answer is 9.
5 x 9 = 45
45
405
45
9/10ths
9.5