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

The expression that is equal to 26.3 is 33 + 27.2 – (30.8) – 3.1

Let's find the expression that is equals to 26.3 .

33 + 27.2 – (6.8 + 24) – 3.1

using PEMDAS rule,

we have to resolve the part of the expression with parenthesis first.

Therefore,

(6.8 + 24) = 30.8

Then,

33 + 27.2 – (30.8) – 3.1

33 + 27.2 – 30.8 – 3.1

Then addition before subtraction according to the rule,

60.2 - 30.8 - 3.1

60.2 - 33.9 = 26.3

The answer should be 26.3 which is D

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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!

A

Step-by-step explanation:

because the square root of 4 is 2

and the square root of 9 is 3

since 7 is in between 4 and 9 the square root is in between 2 and 3