Math is categorical

Author
Cleary, Brian P
 
1)  The mission of addition
2)  The action of subtraction
3)  How long or how wide?: a measuring guide
4)  On the scale: a weighty tale
Author
Publisher
Millbrook Press
Pub. Date
[2009]
Language
English
6)  A-B-A-B-A: a book of pattern play
Author
Publisher
Millbrook Press
Pub. Date
[2011]
Language
English
8)  A dollar, a penny, how much and how many?
9)  A second, a minute, a week with days in it: a book about time