问题
解答题
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答案
(1)125×(7×8),
=125×8×7,
=1000×7,
=7000;
(2)25×(7+4),
=25×7+25×4,
=175+100,
=275;
(3)50×25×4×20,
=(50×20)×(25×4),
=1000×100,
=100000;
(4)85×67,
=(80+5)×67,
=80×67+5×67,
=5360+335,
=5695;
(5)58×41-58,
=58×41-58×1,
=58×(41-1),
=58×40,
=2320.