a) 521⋅(1.5)2−475:1211=5.5⋅2.25−733⋅2221=
=12.375−3⋅23=12.375−4.5=7.875
b) (343⋅54−4.5:3.5):24=(415⋅54−1045⋅3510):24=
=(3−3545):24=(3−172):24=712:24=141
c) 1141⋅(132−12119⋅0.7)=445⋅(35−2140⋅107)= 1141⋅(132−12119⋅0.7)=445⋅(35−2140⋅107)=
=445⋅(35−34)=445⋅31=415=343
d) 481+(1.2−0.65):731=833+0.55⋅223=833+10055⋅223=
=833+1005⋅23=833+20015=200825+20015=
=200840=420040=451
e) (231−1.6):(1.25⋅0.88)=(37−1016):1.1=
=(3070−3048):1011=3022⋅1110=32
f) 331−1.25331+1.25=310−45310+45=
=1240−12151240+1215=12251255=
=1255⋅2512=2555=511=251
g) 3.02−2.925.92:7.2=0.123.6=30
h) 1+243452−452243=
=1+411522−522411=1+522⋅114−411⋅225=
=1+58−85=1+4064−4025=1+4039=14039
i) 3013⋅(3.11+1.09)551⋅321=
=3013⋅4.2526⋅27=591⋅273150=330=10
j) 183281−132:131=811817−35:34=
=2411⋅118⋅43=31⋅1⋅43=41
