Question

QUERO A CONTA!
Quanto é 15×6?​

Answer 1

$\boxed{\begin{array}{l}\sf 15\times5\\\sf podemos\,fazer~assim:\\\sf 15=10+5\\\sf 15\times6=(10+5)\times 6\\\sf agora\,multiplica-se\,6\,por\,10\,e\,pelo\,5.\\\sf 15\times6=(10+5)\times6=60+30=90\end{array}}$