用递等式计算(能巧算的要巧算)2375-216÷18×2516×75×12532×81+81×682788÷(142×2-243)1001×29

2024-11-09 16:13:54
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回答1:

(1)2375-216÷18×25,
=2375-12×25,
=2375-300,
=2075;

(2)16×75×125,
=2×8×75×125,
=(2×75)×(8×125),
=150×1000,
=150000;

(3)32×81+81×68,
=(32+68)×81,
=100×81,
=8100;

(4)2788÷(142×2-243),
=2788÷(284-243),
=2788÷41,
=68;

(5)1001×29-125×29×8,
=(1001-125×8)×29,
=(1001-1000)×29,
=1×29,
=29;

(6)5600÷[184+11×(453-397)],
=5600÷[184+11×56],
=5600÷[184+616],
=5600÷800,
=7.