PBS

Traditional Method to Subtract within 1000

Subtract within 1000 using various representations, strategies, and algorithms. Warm up with a Mystery Math Mistake to find a mistake made in using an algorithm for addition and subtraction. Subtract ...
PBS

Subtraction Strategies

Count back & use the relationship between addition and subtraction to subtract within 20. Warm up with a Mystery Math Mistake to find the error in DC's addition. Use ...
Wane

Fish can do math? Scientists show they can be trained to add, subtract

BONN, Germany (StudyFinds.org) – Apparently, one plus one equals tu-na. A new study reveals that fish are capable of doing simple math problems, just like people! Researchers in Germany have found ...
FOX59 News

Fish can do math? Scientists show they can be trained to add, subtract

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. BONN, Germany (StudyFinds.org) – Apparently, ...