a) 11.24+3.25×1.8=11.24+5.85=17.09
b) 402.35+222.74:04=402.35+556.85=959.2
c) 59+6.71×(15-2.45)=59+6.71×12.55=59+84.2105=
=143.2105
d) 30+(26.2-016):1.23=30+26.04:1.23=30+21.1707317=
=51.1707317
e) 10:(12.4-12.3)-28.376=10:0.1-28.376=100-28.376=
=71.624
f) (3.5:0.5+1.2)×2-1=8.2×2-1=16.4-1=15.4
