why is a number x 1 = that number?

Maeve, Kiara, Jace "Once goes into that number many times."
Mason, Alize "One times that number = that number because the number is multiplied one time."
Charlie, Kiritu " when multiply by one you are only multiplying it once so if you have a big nunber if you have a big number it will be same because you only do it once."
Ryan, Redik Trey " 5x1 =5 because the one is making the number there because multiplying by it self. That number stays the same."