Question

Identify the property shown. −1.4+(−2.6+3.8)=(−1.4+(−2.6))+3.8

Answer 1

This property is called associativity. It shows that it doesn't matter whether you perform the sum on the first two numbers and then the third, or on the second two and then the first, because you will get the same answer either way. That is because addition is associative.