Addition-by-subtraction lives at the heart of Ryan's budget, particularly his health care plans. Ryan proposes to cure health care inflation by capping Medicare payments to beneficiaries at $15,000.

In this study, we experimentally demonstrate deterministic addition and near-deterministic subtraction of a bosonic particle, in particular a phonon of a 171 Yb + ion trapped in a harmonic potential.

The present paper describes the success, the methods (mental, informal written, standard algorithm) and the strategies of informal written arithmetic to be observed when 300 elementary students worked ...

Pearla Nesher, Tamar Katriel, A Semantic Analysis of Addition and Subtraction Word Problems in Arithmetic, Educational Studies in Mathematics, Vol. 8, No. 3 (Oct., 1977), pp. 251-269 ...

Here's how to use Excel as a calculator to perform basic arithmetic operations such as addition, subtraction, multiplication, and division.

Young children can crudely add and subtract numbers before they have learned the rules of arithmetic, a new study finds. Researchers presented five- and six-year-old children with problems such as ...