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.