Minus 0–100

White H House of Math logo on multicolored square
Mute Button
Level
Level icon1
Level icon2
Level icon3
Level icon4
Level icon5
Level icon6
10/10
Bold gray checkmark

Which digit is missing?

77 - 2_ = 55

Prev.

Skip

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