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33x27十99的简便运算

99*27=(100-1)*27=27*100-27=2700-27=2673

33*28+24*99=33*28+24*3*33=33*28+72*33=33*(28+72)=33*100=3300

33x99 =33x(100-1) =33x100-33x1 =3300-33 =3267

99x91+33x27=33x3x91+33x27=33x273+33x27=33x(273+27)=33x300=9900

33*97+99=33*97+33*3=33*(97+3)=33*100=3300

33x99=33x(100-1)=33x100-33x1=3300-33=3267

345+18x(33x27)=345+18x9x99=345+16200-162=(345-162)+16200=183+16200=16383

33*1399=33*1333*3=33*(133)=330.

99*99+33*3=99*99+99=99*(99+1)=99*100=9900

33*99+33=33*(99+1)=33*100=3300

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