A previous version of this post incorrectly characterized the way the standards teach subtraction. Students learn regrouping and the standard algorithm in 4 th grade.

An algorithm in C for calculating linear acceleration necessary to run a step motor smoothly that requires only addition and subtraction. This code accompanies the article “Linear motor control ...

In California, students learned the algorithms for addition, subtraction ... Zimba wrote that the 4th grade standard is a “culminating” standard, and that teachers can begin introducing ...