a) 5^16 . 27^7; b) (-0,2)^2 . 5 - (2^3 . 27^3) / (4^6 . 9^5);

a) 516.2771255.911=516.337535.3211

=516.33.753.5.32.11=516.321515.322=53

b) −0,22.5−23.27346.95

=−152.5−23.333226.325

=152.5−213.39212.310=15.5.5−212.2.39212.39.3

=15−23

=315−1015

=-715

c) 56+22.253+23.125226.56

=56+22.523+23.53226.56

=56+22.52.3+23.53.226.56

=56+22.56+23.5626.56

=56.1+22+2326.56=56.1326.56=1326=12