Bored with math facts flash cards or online practice tests? Master your math facts the fun way! Practice basic subtraction on your own with these hands-on self-correcting Math Keys.
It’s quite simple. Wrap the string from the problem on the left to the answer on the right. Simply turn it over to see if you got it right. Pace yourself with this interlocked set of ten keys, learning to subtract 1, then 2, all the way up to 10.
From 5 Years+