Question

What is the sum of x+y when x = –9.1 and y = 5.6?

Answer 1

$Subtitute\ the\ values\ of\ x=-9.1\\and\ y=5.6\ to\ the\ expression\ x+y:\\\\x+y=-9.1+5.6\\---------\\use\ commutative\ property:a+b=b+a\\\----------\\\\=5.6+(-9.1)=5.6-9.1=\huge\boxed{-3.5}$