Minus 0–1000

White H House of Math logo on multicolored square
Mute Button
Level
Level icon1
Level icon2
Level icon3
Level icon4
Level icon5
8/10
Bold gray checkmark

Which digit is missing?

9_2 - 151 = 831

Prev.

Skip

Green, mystical-looking orb with white energy streaks
Full pink heartFull pink heart