How do you evaluate #10+8-:2-4#?

3 Answers

Answer:

Using PEMDAS you get 10

Explanation:

Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction


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There are no Parenthesis, Exponents or Multiplication so we skip those steps and move on. First we divide 8 by 2 and you get 4.

Then you add 10 to 4, you get 14.

And finally, you subtract 4 from 14 to get 10.

Mar 14, 2018

Answer:

#color(green)(10#

Explanation:

PEMDAS is an acronym for the words parenthesis, exponents, multiplication, division, addition, subtraction.

Given two or more operations in a single expression, the order of the letters in PEMDAS tells you what to calculate first, second, third and so on, until the calculation is complete.

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#10 + 8/2 - 4 = 10 + 4 - 4 = 14 - 4 = 10#

Mar 16, 2018

Answer:

#10#

Explanation:

Count the number of terms and simplify each to a single answer which will be added or subtracted in the last step.

#color(blue)(10)" "color(purple)(+" "8div2)color(green)(" "-" "4)" "larr# there are #3# terms
#color(white)(xxxxxxx)darr#
#color(blue)(10)" "color(purple)(+" "4)color(green)(" "-" "4)#

Now you could work from left to right, but take note of the fact that the last two terms are additive inverses, they add to #0#

#color(blue)(10)" " color(red)(+" "0)#

#=10#

Or:

#color(blue)(10)" "color(purple)(+" "4)color(green)(" "-" "4)#

#=" " 14color(green)(" "-" "4)#

#=" "10#