楼上的第二题错了
1.-------32.8X91-16.4X92-1.75X656=16.4X2X91-16.4X92-7/4X656=16.4(2X91-92)-7X164
=16.4X(90-70)
=16.4X20
=328
2.--------24.4X【9又四分之一减1.75X（3.26+一又五十分之三十七）】除30.5%
=24.4X[37/4-7/4X(326/100+87/50)]X100/30.5
=24.4X[37/4-7/4X(326/100+174/100)]X1000/305
=24.4X[37/4-7/4X5]X200/61
=24.4X1/2X200/61
=24.4X200/61X1/2
=0.4X200X1/2
=40
3----------将55755拆开 55755=5x3x3x3x7x59
因为三个数的最小公约数是59说明他们都是59的倍数
所以他们可以为59X5,59X7,59X3X3X3或者是59X5,59X7,59X3或者59X5x3,59X7,59X3...
但是如果不是第一种情况,其他的三个3就要分开,那么最小公倍数就不会5x3x3x3x7x59
所以只有为59X5,59X7,59X3X3X3正确
他们的和为59x(5+7+9)=59x21=1239
4.---------拆开4851 4851=3X3X7X7X11, 都是质数,分不开了,所以答案为11
此时4851XA是3X7X11的平方
5.--------A/B=(111/1111)X(11111/1111)=(111X11111)/(1111X1111)