1,145×32×20=29×32×100;
2×5=10;
所以最小的自然數(shù)是5×5×5=125.
2,abcabc=abc×1001;
1001=7×11×13;
所以abcabc=7×11×13×abc
約數(shù)的個(gè)數(shù)為：(1+1)(1+1)(1+1)(1+1)=16.
3,
1.4=2×7×0.1;
0.33=3×11×0.01;
3.5=5×7×0.1;
0.3=3×0.1;
0.75=3×5×5×0.01;
0.39=3×13×0.01;
14.3=11×13×0.1;
16.9=13×13×0.1.
14.3×0.39=16.9×0.33;
1.4×0.75=3.5×0.3.
所以有兩種分的方式：（14.3,0.39,1.4,0.75）和（16.9,0.33,3.5,0.3）
或者（14.3,0.39,3.5,0.3）和（16.9,0.33,1.4,0.75）.