脱式计算 (52-39)×26 728-(660+145÷29) (75+360)÷(20-5) 300-225÷5+145

2025-03-11 09:21:17
推荐回答(1个)
回答1:


(1)(52-39)×26,
=13×26,
=338;

(2)728-(660+145÷29),
=728-(660+5),
=728-665,
=63;

(3)(75+360)÷(20-5),
=435÷15,
=29;

(4)300-225÷5+145,
=300-45+145,
=300+100,
=400.