Respuesta :

He could add / subtract by the past amount with the next amount to figure out.

22.75-15.80= 6.95

15.80-12.83= 2.97

30.50-12.83= 17.67

30.50-7.02= 23.48

Kind of like that, hope that helps! :)

He could add / subtract by the past amount
with the next amount to figure out.
22.75-15.80= 6.95
15.80-12.83= 2.97
30.50-12.83= 17.67
30.50-7.02= 23.48
Kind of like that, hope that helps! :)