Get Access to Print and Digital for $23.99 per year.
Subscribe for Full Access
March 1917 Issue [Editor’s Drawer]

Easy subtraction

Adjust
by ,

This article is only available as a PDF to subscribers.

Tags

20th century Children's questions and answers Difference sets Humor Mathematics Study and teaching United States
Adjust
| View All Issues |

March 1917

| View All Issues |
Table of Contents
Close
“An unexpectedly excellent magazine that stands out amid a homogenized media landscape.” —the New York Times
Subscribe now
Close
You’ve read one of your two free articles this month. Subscribe for less than $2 an issue.
Close
You’ve read your last free article this month. Subscribe now for only $21.97 per year to continue reading.

Debug