How do you simplify 28 ÷ 4 • 3?

2 Answers
Apr 20, 2017

21

Explanation:

In BIDMAS, Division comes first so you divide first and then multiply.

28/4 = 7

7*3 = 21

Apr 20, 2017

(28 xx3)/4= 21

Explanation:

Multiplication and division have the same priority, so it should make no difference which is done first.

However there is still an element of ambiguity because the div sign could indicate division of everything following.

This is a good example of the importance of showing exactly what is meant.

28 div 4 xx 3 would be written as (28 xx3)/4= 21

28 div (4xx3) would be written as 28/(4xx3) = 7/3 = 2 1/3

My leaning would be towards the first one.