Respuesta :

Answer: 399=300+90+9

-45=0+40+5

300+130+14=414

Step-by-step explanation:

Expanded form is a way to write numbers by showing the value of each digit.

Answer:

300 + 90 + 9

-45= 0 + 40 + 5

399-45=354

Step-by-step explanation: