问题
解答题
脱式计算
130+25×14
240÷16÷3
825-800÷25
388-(79-21)
答案
(1)130+25×14
=130+25×2×7,
=130+50×7,
=130+350,
=480;
(2)240÷16÷3
=240÷8÷2÷3,
=30÷2÷3,
=5;
(3)825-800÷25
=825-800÷5÷5,
=825-160÷5,
=825-32,
=793;
(4)388-(79-21)
=388+21-79,
=409-79,
=330.