Question

1*a=write appropriate property

Answer 1

$\mathcal{\underline{\red{Multiplicative Identity Property}}}$

According to Multiplicative Identity property,
Any No. multiplied by 1 gives the same No. as resultant product.

Formally, written as
$\mathcal{\pink{1×a=a}}$

$\mathcal{\huge{\blue{Hope it helps}}}$