A)0.4*2.55*1.6
0.4*2.55=1.02
1.02*1.6=1.632
б)(1.34+0.9)*5.4
1.34+0.9=2.24
2.24*5.4=12.096
в)40(7.85-3.9)
7.85-3.9=3.95
40*3.95=158
г)17-3.44*3.5
3.44*3.5=12.04
17-12.04=4.96
д)2.15(3.9+0.18)5
3.9+0.18=4.08
15*4.08=61.2
61.2*5=306
е)20.3-5.7(2.4+0.43)
2.4+0.43=2.83
2.83*5.7=16.131
20.3-16.131=4.169