Question

Matt and Karen, both run to you to settle a dispute. They were working on a math problem and got different answers. Wisely, you decide to look at their work to see if you can spot the source of confusion.Matt
6 – 4(3 – 5)2 + 30 ÷ 5
6 – 4(–2)2 + 30 ÷ 5
6 – 4(4) + 30 ÷ 5
6 – 16 + 30 ÷ 5
−10 + 30 ÷ 5
20 ÷ 5
4
Karen
6 – 4(3 – 5)2 + 30 ÷ 5
6 – 4(–2)2 + 30 ÷ 5
6 – 4(−4) + 30 ÷ 5
6 + 16 + 30 ÷ 5
6 + 16 + 6
22 + 6
28 Explain to Matt and Karen who, if any, is correct and identify errors that you find. Provide the correct manner to fix those solutions and identify the correc

Answer 1

The first difference is the line
Matt: 6 – 4(4) + 30 ÷ 5
Karen: 6 – 4(−4) + 30 ÷ 5

matt is multiplying the (-2)2 and getting 4
karen is multiplying the (-2)2 and getting -4

Answer 2

the next problem is the order of operations -
matt does brackets, multiplications, subtracting, adding then dividing
karen does brackets, multiplication, division, then adding (she does not have and subtracting to do)

only one of those is the right way

Answer 3

Karen's mistake is only squaring a negative number.

Answer 4

Order of Operations = PEMDAS
Parenthese
Exponents
Multiplication
Division
Addition
Subtraction

Answer 5

^ Yeah

Answer 6

@lesliemolina So do you get it ?

Answer 7

ya but whos is right matt or karen

Answer 8

Matt is correct.

Answer 9

ok thank you

Answer 10

My pleasure.

Answer 11

Medal? :)