问题 解答题

(1)385×(215-209)

(2)72×38+28×38

(3)875+125×8904÷4×2

(4)666×7÷6

(5)3645-(1824+1645)

答案

(1)385×(215-209),

=385×6,

=2310;

(2)72×38+28×38,

=(72+28)×38,

=100×38,

=3800;

(3)875+125×8904÷4×2,

=875+125×8×1113÷4×2,

=875+1000×1113÷4×2,

=875+1113000÷2,

=875+556500,

=557375;

(4)666×7÷6,

=666÷6×7,

=111×7,

=777;

(5)3645-(1824+1645),

=3645-1824-1645,

=3645-1645-1824,

=2000-1824,

=176.

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