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How do you simplify #28 ÷ 4 • 3#?

Answer 1

Eli Assouline

Since division comes first in BIDMAS, you divide before multiplying.

#28/4# = 7

#7*3# = 21

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Answer 2

Abigail Allen

#(28 xx3)/4= 21#

Since division and multiplication have equal importance, it shouldn't matter which is completed first.

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

This exemplifies why it's critical to convey the precise meaning that is intended.

#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#

I would lean more toward option number one.

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Answer 3

Abigail Allen

To simplify (28 ÷ 4 \cdot 3), you follow the order of operations, which is PEMDAS: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right). In this expression, division and multiplication are on the same level, so you perform them from left to right. First, you divide 28 by 4 to get 7, then you multiply 7 by 3 to get 21. Therefore, (28 ÷ 4 \cdot 3) simplifies to (21).

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.