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33.33*66.66+44.44*99.99 巧算

56×33+56×66+99×44 =56x(33+66)+99x44 =56x99+99x44 =99x(56+44) =99x100 =9900

44*(44+66) =44*100+44*10 =4400+440 =4840

11的n次方 先把11提出来

原式等于 11×45=495 ~回答完毕~ ~\(^o^)/~祝学习进步~~~

=66*22+55*44+55*66-66*77 =66*-55+55*44+55*66 =55*44 =11*5*11*4 =121*20 =2420

11*22+22*33+33*44+44*55+55*66+66*77+77*88+88*99 =11*11*(2+2*3+3*4+4*5+5*6+6*7+7*8+8*9) =121*(2+6+12+20+30+42+56+72) =121*240 =29040

99*22+88*33+77*44+66*55 =9×11×2×11+8×11×3×11+7×11×4×11+6×11+5×11 =11²×(18+24+28+30) =121×100 =12100 谢谢采纳!

66x280+330x44 =33×2×10×28+330×44 =330×(56+44) =330×100 =33000

11*2*11*7+11*3*11*6+11*4*11*5+11*6*11*8=11??(14+18+20+48)=121*100=12100

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