问题
解答题
计算下面各题,能简便计算的要求简便计算.
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答案
(1)(480+240)÷24-12,
=720÷24-12,
=30-12,
=18;
(2)(480+240)÷(24-12),
=720÷12,
=60;
(3)(197+243)÷22×6,
=440÷22×6,
=20×6,
=120;
(4)158+36+42+264,
=(158+42)+(36+264),
=200+300,
=500;
(5)258×12-58×12,
=(258-58)×12,
=200×12,
=2400;
(6)25×64×125,
=25×8×8×125,
=(25×8)×(8×125),
=200×1000,
=200000.