Adding and subtracting negative numbers A number line can be used to add and subtract negative numbers.

Miss James teaches you the valuable "counting on" strategy to help you solve tricky addition problems.

Researchers from 4 projects with a problem-solving approach to teaching and learning multidigit number concepts and operations describe (a) a common framework of conceptual structures children ...

Twenty-four first-grade children were asked to write number sentences and select appropriate alternative number sentences for addition and subtraction word problems. Responses were qualitatively ...