White H House of Math logo on multicolored square
Colorful House of Math logo
Log inSign up

Learning Tools

Curriculum

Curriculum

Games

Multiplication Master

Multiplication Master

Junior Math

Junior Math

Invite a Friend

Curriculum

Log in
Mute Button
Level
Level icon1
Level icon2
Level icon3
Level icon4

Doubling and Halving

6/10
Bold gray checkmark

Halve the number

22

Prev.

Skip

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