## Elementary Algebra

In order to follow order of operations, we perform addition and subtraction starting on the left and going right: $-5.2+6.8-4.7-3.9+1.3$ =$(-5.2+6.8)-4.7-3.9+1.3$ =$(1.6)-4.7-3.9+1.3$ =$(1.6-4.7)-3.9+1.3$ =$(-3.1)-3.9+1.3$ =$(-3.1-3.9)+1.3$ =$(-7.0)+1.3$ =$-5.7$