8 3/5 - 7= 8.6 - 7= 1.6
8 1/3 0.45= (25/3) 0.45= 7.41
2 2/5 : 1.2= (12/5) / 1.2= 2.4
(1/3 + 0.8) : (4/15)= (1/3 + 0.8) / (4/15)= (0.3333 + 0.8) / (0.2666)= 1.1333 / 0.2666= 4.25
Therefore, the results are:
8 3/5 - 7
= 8.6 - 7
= 1.6
8 1/3 0.45
= (25/3) 0.45
= 7.41
2 2/5 : 1.2
= (12/5) / 1.2
= 2.4
(1/3 + 0.8) : (4/15)
= (1/3 + 0.8) / (4/15)
= (0.3333 + 0.8) / (0.2666)
= 1.1333 / 0.2666
= 4.25
Therefore, the results are:
1.67.412.44.25