a) `74. 27 + 27 . 30 – 27. 4`
`= (74+30-4).27`
`= 100.27`
`= 2700`
b) `2.31.24 + 8.6.42 + 16.27.3`
`= (2.24).31+(8.6).42+(3.16).27`
`= 48.31+48.42+48.27`
`=(31+42+27).48`
`= 100.48`
`= 4800`
c) `26.48 + 48. 152 - 48. 78`
`= (26+152-78).48`
`= 100.48`
`= 4800`
d) `26. 256 + 56.256 - 82.256`
`= (26+56-82).256`
`= 0.256`
`= 0`
e) `32. 54 + 32. 46 – 50`
`= 32.(54+46)-50`
`= 32.100-50`
`= 3200-50`
`= 3150`