Obliczenia
[tex]\text{I}. \ 6\cdot1\frac{2}{3}=6\cdot\frac{5}{3}=2\cdot5=10\in\mathbb{C}\\\\\text{II}. \ 6:1,2=60:12=5\in\mathbb{C}\\\\\text{III}. \ 7,25-2\frac{1}{4}=7,25-2\frac{25}{100}=7,25-2,25=5\in\mathbb{C}\\\\\huge\boxed{\text{Odp}. \ \text{A}}[/tex]