15 minus 2 times (5 plus 3) divided by 4 =?
回答 (22)
2009-05-07 3:22 pm
✔ 最佳答案
15 - 2(5+3)/4 =Rules of operation: Perform work inside parentheses first:
15 - 2(8)/4 =
Next perform multiplication and division working from the left:
15 - 16/4 =
15 - 4 =
Finally, perform addition/subtraction working from the left:
15 - 4 = 11
A handy tool for remembering order of operations:
Please Excuse My Dear Aunt Sally
P = Parenthese
E = Exponents
M/D = Multiplication/Division
A/S = Addition/Subtraction
2009-05-07 3:20 pm
15 - 2 ((5 + 3) / 4)
=> 15 - 2 (8 / 4)
=> 15 - 2 * 2
=> 15 - 4
=> 11
=> 15 - 2 (8 / 4)
=> 15 - 2 * 2
=> 15 - 4
=> 11
2009-05-07 3:19 pm
15 - 2(5 + 3) / 4
15 - 2(8)/4
15 - 16/4
15 - 4
11
EDIT: remember the order of operations. You must do the parentheses first: 5 + 3 = 8. Then, since there are no more parentheses, the rule is perform all multiplication and division first before ANY addition and subtraction. So we do 2 * 8 / 4 = 4 BEFORE subtracting anything from 15.
15 - 2(8)/4
15 - 16/4
15 - 4
11
EDIT: remember the order of operations. You must do the parentheses first: 5 + 3 = 8. Then, since there are no more parentheses, the rule is perform all multiplication and division first before ANY addition and subtraction. So we do 2 * 8 / 4 = 4 BEFORE subtracting anything from 15.
2009-05-07 3:20 pm
15 - 2(5+3) /4
=15 -2(8)/4
=15 - 16/4
=15 - 4
=11
Rule: multiply and divide first, then plus and minus.
do from left to right.
=15 -2(8)/4
=15 - 16/4
=15 - 4
=11
Rule: multiply and divide first, then plus and minus.
do from left to right.
2009-05-07 3:22 pm
15 - 2 x (5 + 3) ÷ 4
= 15 - 2 x 8 ÷ 4
= 15 - 16 ÷ 4
= 15 - 4
= 11
= 15 - 2 x 8 ÷ 4
= 15 - 16 ÷ 4
= 15 - 4
= 11
2009-05-07 3:20 pm
4
2009-05-10 3:28 pm
you have many different answers because your question is ambiguous. I find it humorous that none of the other answers noticed that, even though there were so many different answers.
several possibilities:
(15–2)(5+3) / 4
15–[2(5+3) / 4]
[15–2(5+3)] / 4
each has a different answer
(15–2)(5+3) / 4
13*8/2
13*4
52
15–[2(5+3) / 4]
15–[2(8) / 4]
15–[16 / 4]
15–[4]
11
[15–2(5+3)] / 4
[15–2(8)] / 4
[15–16] / 4
–1/4
.
several possibilities:
(15–2)(5+3) / 4
15–[2(5+3) / 4]
[15–2(5+3)] / 4
each has a different answer
(15–2)(5+3) / 4
13*8/2
13*4
52
15–[2(5+3) / 4]
15–[2(8) / 4]
15–[16 / 4]
15–[4]
11
[15–2(5+3)] / 4
[15–2(8)] / 4
[15–16] / 4
–1/4
.
2009-05-07 3:29 pm
{15-2(5+3)}/4=(15-16)/4= -1/4
2009-05-07 3:22 pm
so the equation is:
15 - 2(5+3) / 4
As a rule, you must complete the equation inside the brackets first, so 5 + 3 = 8
Then, you complete everything outside the brackets:
so 15 - 2 x 8 / 4
which equals:
15 - 16 / 4
which equals:
-1 / 4
Therefore the answer is minus one over four (or -1/4) or -0.25
15 - 2(5+3) / 4
As a rule, you must complete the equation inside the brackets first, so 5 + 3 = 8
Then, you complete everything outside the brackets:
so 15 - 2 x 8 / 4
which equals:
15 - 16 / 4
which equals:
-1 / 4
Therefore the answer is minus one over four (or -1/4) or -0.25
2009-05-07 3:21 pm
hmmmmmmmm.i gt a sista named sherry..is it u lol
do the brackets 1st 5 + 3 = 8
then do the 15 - 2 = 13
then times 13 by 8 = 104
and divide it by 4 = 26 !!
easy peazy
do the brackets 1st 5 + 3 = 8
then do the 15 - 2 = 13
then times 13 by 8 = 104
and divide it by 4 = 26 !!
easy peazy
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