Question

Which expression is equivalent to 16.8 - 18.616.8−18.616, point, 8, minus, 18, point, 6? Choose 1 answer: Choose 1 answer: (Choice A) A 16.8-(-18.6)16.8−(−18.6)16, point, 8, minus, left parenthesis, minus, 18, point, 6, right parenthesis (Choice B) B -18.6+(-16.8)−18.6+(−16.8)minus, 18, point, 6, plus, left parenthesis, minus, 16, point, 8, right parenthesis (Choice C) C 18.6-16.818.6−16.818, point, 6, minus, 16, point, 8 (Choice D) D 16.8+(-18.6)16.8+(−18.6)

Answer 1

Given:

The expression is

$16.8-18.6$

To find:

The expression which is equivalent to the given expression.

Solution:

We have,

$16.8-18.6=-1.8$

In option A,

$16.8-(-18.6)=16.8+18.6$

                        $=35.4\neq -1.8$

In option B,

$-18.6+(-16.8)=-18.6-16.8$

                        $=-35.4\neq -1.8$

In option C,

$18.6-16.8=1.8\neq -1.8$

In option D,

$16.8+(-18.6)=16.8-18.6=-1.8$

Only the value of the expression in option D is equal to the value of given expression.

Therefore, correct option is D.