递等式计算.(能简便的用简便方法计算)(1)99×101(2)73×165-73×66+73(3)25×64×125×13(4)9

2025-06-27 21:36:00
推荐回答(1个)
回答1:

(1)99×101
=99×(100+1)
=99×100+99×1
=9900+99
=9999;

(2)73×165-73×66+73
=73×(165-66+1)
=73×100
=7300;

(3)25×64×125×13
=25×(8×8)×125×13
=(25×8)×(8×125)×13
=200×1000×13
=200000×13
=2600000;

(4)9670-(129-73)×24
=9670-56×24
=9670-1344
=8326;

(5)(67×25+33×25)×40
=[(67+33)×25]×40
=[100×25]×40
=2500×40
=100000;

(6)450÷[(393-388)×(6+4)]
=450÷[5×10]
=450÷50
=9.