12/
a) 3.7x2.5 + 0.1x3 = 9.25 + 0.3= 9,55 ≈ (aproximativ) 9.5 sau 9.6
b) 2.19x10 - 3,4:10 = 21.9 - 0.34= 21.56 ≈ 21.6
c) 6.21x5 + 12.3x2.2 = 31.05 + 27.06 = 58.11 ≈ 58
d) 7.13x10 - 36.14:2 = 71.3 -18.07 = 53.32 ≈ 53
e) 2.5^2 + 3.7x3 = 6.25+ 11.1 = 17.35 ≈ 17
f) 29:4 + 12x3.6 -0.7^2 = 7.25 + 43.2 - 0.49 = 49.96 ≈ 50
