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64×99用简便计算

64×99 =64×(100-1) =64×100-64×1 =6400-64 =6336

99x64 =(100-1)x64 =100x64-1x64 =6400-64 =6336 谢谢,请采纳

99×64简便运算 99×64 =100x64-64 =6400-64 =6336

99x64 =(100-1)*64 =100*64-64 =6400-64 =6336

(576÷9+64×99)÷25怎样简便计算 (576÷9+64×99)÷25 =(64+64*99)÷25 =64*(1+99)÷25 =64*4 =256

①46×26+26×64 =26×(46+64)=26×(100+10)=2600+260=2860 ②99×56 =(100-1)×56=5600-56=5544③25×44 =25×(40+4)=1000+100=1100④83×101-83=83×(101-1)=83×100=8300

3.25×(199×5.64+ 99×5.64) =3.25×(199+1)×5.64 =3.25×200×5.64 =650×5.64 =3666

6.48×99+0.1×64.8 =6.48x99+6.48 =6.48x(99+1) =6.48x100 =648

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