efectuati respectand ordine efectuarii operatiilor.64+{3+5×[29+2×(4831-30×160)]}×10ex 8 punctele d si e si ex9 a b va rog acum ca imi trebuie maine la mate dau coroana urgent
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Răspuns:
Ex 8
d)64+{3+5•[29+2•(4831-4800)]}=
=64+[3+5•(29+2•31)]=
=64+[3+5•(29+62)]=
=64+(3+5•91)=
=64+(3+455)=
=64+457=
=521•10=5120
e)6225-2•[5•(2•120+3•112)]=
=6225-2•[5•(240+336)]=
=6225-2•(5•576)=
=6225-2•2880=
=6225-5760=
=465
Ex 9
a)5•[5+5•(5³-5²)]+3•5²=
=5•(5+5•5¹)+3•25=
=5•(5+5•5)+75=
=5•30+75=
=150+75=
=225
B ul este gresit