Choose the expression that is equal to 28.3. A. 33 + 27.2 - 6.8 + 24 - 3.1 B. 33 + 27.2 - (6.8 + 24 - 3.1) C. [33 + (27.2 - 6.8) ] + 24 - 3.1 D. 33 + 27.2 - (6.8 + 24) - 3.1

All are wrong

Step-by-step explanation:

Here, we shall be evaluating each of the options to see which would give 28.3. We proceed chronologically;

A. 33 + 27.2 - 6.8 + 24-3.1

Since there are no brackets, we can proceed anyhow we like.

)

Answer here is 74.3

Not what we are looking for

B. Careful, a bracket is here!

33 + 27.2 - (6.8+24-3.1)

we evaluate bracket first

33 + 27.2 - (27.7)

Opening the bracket, we have;

33 + 27.2 - 27.7

= 32.5

Not what we are looking for

C. Quite tricky, several brackets

(33 + (27.2-6.8)) + 24 - 3.1

We work with the innermost bracket, then link with the bracket beside

(33 + 20.4) + 24-3.1 = 53.4 + 24 - 3.1 = 74.3

Not what we are looking for

D And lastly?

33 + 27.2 - (6.8 + 24) - 3.1

Brackets first;

33 + 27.2 - (30.8) - 3.1

= 26.3

Not 28.3 too? Shocking!