问题 解答题
计算下列各题
①80-4×9÷3
②2400÷4÷25③42.37-7.56-2.44④(126-87)×12÷26.
答案

①80-4×9÷3

=80-36÷3,

=80-12,

=68;

②2400÷4÷25

=2400÷(4×25),

=2400÷100,

=24;

③42.37-7.56-2.44

=42.37-(7.56+2.44),

=42.37-10,

=32.37;

④(126-87)×12÷26

=39×12÷26,

=468÷26,

=18.

单项选择题
单项选择题