RT Book, Section A1 Hall, Susan J. SR Print(0) ID 6064593 T1 Appendix A: Basic Mathematics and Related Skills T2 Basic Biomechanics, 5e YR 2007 FD 2007 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-304481-1 LK accessphysiotherapy.mhmedical.com/content.aspx?aid=6064593 RD 2024/03/28 AB Negative numbers are preceded by a minus sign. Although the physical quantities used in biomechanics do not have values that are less than zero in magnitude, the minus sign is often used to indicate the direction opposite the direction regarded as positive. Therefore, it is important to recall the following rules regarding arithmetic operations involving negative numbers: