Minus 0–20

White H House of Math logo on multicolored square
Mute Button
Level
Level icon1
Level icon2
Level icon3
Level icon4
Level icon5
Level icon6
9/10
Bold gray checkmark

Subtract

one ten rod, two unit blocks minus nine

Prev.

Skip

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