Question

Which expression is equivalent to −4.7+(−0.3)+(−1.4)−4.7+(−0.3)+(−1.4) ?

Answer 1

Ok so first I solved the original problem and got -12.8, then i solved all the other ones to see which one gets the same answer. The following answers are in order according to the problem

-7.2
-12.8
-3.4
-3

So the answer would be the second one because it has the same answer as the original problem

Answer 2

The answer is B. 

WORK: −(4.7+0.3+1.4)−(4.7+0.3+1.4)=−(5+1.4)−(4.7+0.3+1.4)=−6.4−(4.7+0.3+1.4)=−6.4−(5+1.4)=−6.4−6.4=−12.8   
 
And that answer is equivalent to the original equation.

Work: −4.7−0.3−1.4−4.7−0.3−1.4=−5−1.4−4.7−0.3−1.4=−6.4−4.7−0.3−1.4=−11.1−0.3−1.4=−11.4−1.4=−12.8