d) 27 : 22 + 54 : 53. 24 – 3.25
= $\frac{27}{22}$ + $\frac{54}{53}$.24 - 75
= $\frac{27}{22}$ + $\frac{1296}{53}$ - 75
= $\frac{29943}{1166}$ - 75
= -$\frac{57507}{1166}$
l) (57 + 75).(68 + 86).(24 – 42)
= 132.154.12
= 20328.12
= 243936
e) (35.37) : 310 + 5.24 – 73 : 7
= 1295 : 310 + 120 - 73/7
= 259/62 + 120 - 73/7
= 7699/62 - 73/7
= 493667/434
m) (75 + 79).(54 + 56).(33.3 – 92)
= 154.110.(99 - 92)
= 154.110.7
= 16940.7
= 118580
f) 32.[(52 – 3) : 11] – 24 + 2.103
= 32.(49 : 11) - 24 + 206
= 1568/11 - 24 + 206
= 1304/11 + 206
= 3570/11
n) [(52.23) – 72.2) : 2].6 – 7.25
= [(1196 - 144) : 2].6 - 175
= (1052 : 2).6 - 175
= 526.6 - 175
= 3156 - 175
= 2981