Resposta:

1. a) 36÷2 = 18

      b) [tex]x = \frac{n}{t}[/tex] → [tex]x = \frac{36}{2}[/tex]

      c)   [tex]x = \frac{n}{t}[/tex]  

    2. a) 1.740 ÷ 30 = 58

         b) 1.740 ÷ 58 = 30