White H House of Math logo on multicolored square
Colorful House of Math logo

Learning Tools

Curriculum

Curriculum

Curriculum

Log in
Mute Button
Level

Minus 0–1000

9/10
Bold gray checkmark

Which digit is missing?

754 - 532 = _22

Prev.

Skip

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