900-9?=450 ?+40•?=560 ?+5•?=850

Question

900-9?=450
?+40•?=560
?+5•?=850

Answer 1

900-9×50=450
0+40×14=560
0+5×170=850

Answer 2

900-9×50=450
0+40×14=560
0+170×5=850