In a cross-sectional study, 160 students in Grades 2, 4, 7, and 11 were interviewed about their reasoning when solving integer addition and subtraction open-number-sentence problems. The authors ...

Big Number Operations is a Delphi-based project that aims to handle numbers that are too large to be stored as integers. These large numbers, also known as "Big Numbers", are stored as strings and are ...

I thought a student I work with would find it useful to improve their fluency at addition, subtraction and multiplication of small signed integers. I also thought that there would be many websites ...

Mathematics Teaching in the Middle School (MTMS) is an official peer-reviewed journal of the National Council of Teachers of Mathematics and is intended as a resource for middle school students, ...

Representing integers on number line. Negative, positive numbers... Representing integers on number line. Negative, positive numbers and zero. Math chart for addition and subtraction operations in ...

Abstract: This paper presents a unified logic for flagged prefix addition-subtraction that eliminates the need to perform constant addition and subtraction in two separate blocks. The logic is based ...