а) 0,3452 × 10 = $$rac{3452}{10000} cdot 10 = \frac{3452}{1000} = 3,452$$
б) 0,3452 × 100 = $$\frac{3452}{10000} \cdot 100 = \frac{3452}{100} = 34,52$$
в) 0,3452 × 1000 = $$\frac{3452}{10000} \cdot 1000 = \frac{3452}{10} = 345,2$$