а)45,81+21,301-33,048=б)345,5-159,08+73,55=в)82,1

а) 45,81+21,301-33,048=34,063

45,81+21,301=67,111

67,111-33,048=34,063

б) 345,5-159,08+73,55=259,97

345,5-159,08=186,42

186,42+73,55=259,97

в) 82,1*2,03-102,58=64,083

82,1*2,03=166,663

166,663-102,58=64,083

г) (1183,7-872,2):2,8=111,25

1183,7-872,2=311,5

311,5/2,8=111,25

а)45.81+21.301-33.048=34,063

б)=259,97

в)=64,083

г)=111,25