## Elementary Technical Mathematics

Following the order of operation rules, first complete the multiplication, the subtract the products. The numerator and denominator are treated as if they are in parentheses, so division is the final operation. $\frac{(8.5)(4.7)-(1.4)(2.6)}{6-(0.28)(1.75)}=\frac{39.95-3.64}{6-0.49}=\frac{36.31}{5.51}=6.5\underset\uparrow898366606$ The digit to the right of the 3rd significant digit is greater than 5, so round up.