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.

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