What property is 37 x 1 equals 37?

Answer 1

I think the questioner is looking for that this is an example of the identity property of multiplication.

Multiplication. It is simply repeated addition. 37 x 1 implies that 37 is being added once to zero. Thus, 37+0 = 37.

To further explain it, we could take any number and do the same. For example, say, 37 x 3. It implies that 37 is being added thrice to zero. Thus, 37+37+37+0=111.