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

Question

Luna Angel · Accepted Answer

Using PEMDAS you get 10

Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

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.

Cameron Arnold · Answer

#color(green)(10#

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.

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

Autumn Arnold · Answer

#10#

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#

Nova Allen · Answer

undefined To evaluate the expression $10 + 8 ÷ 2 - 4$, you follow the order of operations, which is parentheses, exponents, multiplication and division (from left to right), and addition and subtraction (from left to right).

$10 + 8 ÷ 2 - 4 = 10 + (8 ÷ 2) - 4$

$10 + (8 ÷ 2) - 4 = 10 + 4 - 4$

$10 + 4 - 4 = 14 - 4$

$14 - 4 = 10$

Therefore, the value of the expression is $10$.