a) (16·12¹⁰⁻⁴·12¹⁰):12¹¹=
=(16·12⁶):12¹¹=
=16·12¹¹⁻⁶=
=16·12⁵=
=192⁵
b)10³·85-10³·61-3000=
=1000·85-1000·61-3000=
=85000-61000-3000=
=24000-3000=
=21000
c)15²-(14·15+15):15²=
=15²-215:15²=
=10:15²=
=0,0(4)
d)5¹¹-(6·5¹⁰-2·5¹⁰)=
=5¹¹-(30-10)¹⁰=
=5¹¹-20¹⁰=
=(20-5)¹¹⁻¹⁰=
=15¹=
=15