Question

Alguém pode resolver essa expressão numérica?

Answer 1

Resposta:

$\sf \left( - \dfrac{2}{7} \right) \cdot \left( - \dfrac{21}{2} \right) + \left( + \dfrac{1}{3} \right) \div \left( - \dfrac{1}{3} \right) = 2$

Explicação passo-a-passo:

$\sf \left( - \dfrac{2}{7} \right) \cdot \left( - \dfrac{21}{2} \right) + \left( + \dfrac{1}{3} \right) \div \left( - \dfrac{1}{3} \right) =$

$\sf \left( - \dfrac{2 \div 2}{7\div 7} \right) \cdot \left( - \dfrac{21 \div 7}{2\div 2} \right) + \left( + \dfrac{1}{3} \right) \cdot \left( - \dfrac{3}{1} \right) =$

$\sf \left( - \dfrac{1}{1} \right) \cdot \left( - \dfrac{3}{1} \right) + \left( - \dfrac{3}{3} \right) =$

$\sf \left( +\dfrac{3}{1} \right) + \left( - \dfrac{3}{3} \right) =$

$\sf +\dfrac{3}{1} -\dfrac{3}{3} =$

$\sf 3 - 1 =$

$\boldsymbol{ \sf \displaystyle 2 } \quad \gets$