Students put all their addition and subtraction skills together to solve equations.

Use Notice and Wonder with a 10-frame, connecting cubes, and place-value cards to ask and answer math questions. Then, represent teen numbers using addition and subtraction equations and one 10.

In recent months the phrase "addition by subtraction" seems to be seeing heavy use by sports analysts. First and foremost, this phrase makes absolutely no sense whatsoever.

In the video above, the MinutePhysics team demonstrates how addition can be used to solve subtraction problems. It requires budding modular mathematicians to perform some simple subtraction ...

Michelle Stephan, Didem Akyuz, A Proposed Instructional Theory for Integer Addition and Subtraction, Journal for Research in Mathematics Education, Vol. 43, No. 4 (July 2012), pp. 428-464 ...

The new theme is Addition and Subtraction, stories of humans becoming more and less and sometimes both with the help of technology.