计算1.25×3.9×2.1÷(3.5×2.5×0.39),结果是_.

问题描述:

计算1.25×3.9×2.1÷(3.5×2.5×0.39),结果是______.

1.25×3.9×2.1÷(3.5×2.5×0.39),
=(1.25÷2.5)×(3.9÷0.39)×(2.1÷3.5),
=0.5×10×0.6,
=(0.5×0.6)×10,
=0.3×10,
=3;
故答案为:3.