问题
解答题
脱式计算.
26×4-125÷5
(124-85)×12÷26
280+(280-280÷70)
(75+240)÷(20-5)
答案
26×4-125÷5,
=104-25,
=79;
(124-85)×12÷26,
=39×12÷26,
=468÷26,
=18;
280+(280-280÷70),
=280+(280-4),
=280+276,
=556;
(75+240)÷(20-5),
=315÷15,
=21.