(1)207-198÷9
=207-22
=22;
(2)89-13×6+65
=89-78+65
=11+65
=76;
(3)15×27-3000÷25
=405-120
=285;
(4)(145-121)×18÷27
=24×18÷27
=432÷27
=16;
(5)(85+420)÷(24-19)
=505÷5
=101.
(1)207-198÷9
=207-22
=22;
(2)89-13×6+65
=89-78+65
=11+65
=76;
(3)15×27-3000÷25
=405-120
=285;
(4)(145-121)×18÷27
=24×18÷27
=432÷27
=16;
(5)(85+420)÷(24-19)
=505÷5
=101.