standard form = 380.

standard form= 380. Expanded form to= (3 * 100) + (8 * 10) Basic facts+ [(3 + 5) * 10] property= [(2 + 1) * 100]+ [(3 * 10) + (5 * 10)] property= [(2 * 100) + (1 * 100)]+ (3 * 10)] + (5 * 10) property= (2 * 100) + [(1 * 100)+ (1 * 100)] + (5 * 10) property= (2 * 100) + [(3 * 10)+ [(1 * 100) + (5 * 10)][(2 * 100) + (3 * 10)]