parantheses AND these things [ ] ???

Question

what do i do when there are both parantheses and bracket things that are like this: [ ]

here is the problem? explain what to do (DONT GIVE ANSWER)

10 [8 (15-7) - (4 x 3)]

umm yeah [-_-]

remember explain step by step please and don't give the answer =)

thanks so much

Answer 1

The square brackets are treated just like parentheses. It simply means "calculate the stuff in here first". Your problem uses square brackets so you don't confuse one pair of parentheses with another. It helps keep the problem orderly and easy to read.

Remember the order of operations: PEMDAS
1. Parentheses
2. Exponents
3. Multiplication/Division
4. Addition/Subtraction

Since you have parentheses inside parentheses, do the inner-most parts first; (15-7) and (4*3). Then, do the multiplication (multiply by 8). Now do the subtraction inside the parentheses (the square brackets). Finally, do the final multiplication by 10, and you have the answer.

Answer 2

The [ act the same as (, but when you have alot its easier to differentiate rather than having ((( or whatever.

so you would do the 15-7 = 8, multiply by the 8 for 64. Then do the 4*3 = 12, and subtract that from the 64. Then multiply that result by 10.

Answer 3

You treat square brackets exactly as if they were round ones. The only purpose of using them is to make the formula easier to read, and the brackets easier to pair up.
10 [8 (15-7) - (4 x 3)]
is identical in meaning to:
10(8 (15 - 7) - (4 x 3)).

Answer 4

10 [8 (15-7) - (4 x 3)]

<==do the inner parentheses first
(15-7) = 8
(4x3)= 12
=10 * [8 *(7) - (12)]

<== multiplication within square brackets
8*(7) = 8 * 7 =56
=10 * [56 - (12)]

<== substraction inside square bracket
56 - 12 = 44
= 10 * [44]

= 440 <== mulitplication

Answer 5

Work from the inside out, treating them like another pair of partentheses. Your problem is no different from
10 (8 (15-7) - (4*3)).

So Taking the innner most terms gives us
10 [ 8(8) - 12], which gives us 10 [ 64 - 12], which you can do from there.

By the way, the "[ ]" symbols are themselves called brackets. "( )" are parentheses. "{ }" are braces.

Answer 6

http://mathforum.org/library/drmath/view/58445.html

go to this website and it will explain what the brackets are actually there for. :)

pretty much to separate what you put there
first parentheses then the brackets....
(15-7)= ? - (4 x 3) = ? then subtract the two answers ? - ? = ?
then you would have 10[8(?)] < go inside the brackets and multiply your answer by 8 and then multiply by 10 and you have your final answer.

Answer 7

Mistake in terminology. A parenthesis is what is contained within standing brackets. The standing brackets, whether (,[, or {, are not parentheses.

Subtract 12 from 8, multiply that difference by 8, then multiply that product by 10.

Answer 8

okay,
first, you do 15-7 in the parentheses and 4x3 in the parentheses.
Then, you multiply 8 by 8 (from the 15-7) and subtract 12 (from 4x3) from 64 (from the 8x8)
After that , you multiply the difference and multiply it by ten
then there is your answer!

10[8 (15-7)-(4x3)]
10[8 (8)-(12)]
10[64-12]
10[52]
ANSWER

Answer 9

Inner most grouping symbols are evaluated first.
Replace what is inside ( ) or [ ] with a number and then continue to evaluate.
10[8-12] (Replace what is inside () with a number)
10[-4](Replace what is inside [ ] with a number)
-40

Answer 10

OK first you do parentheses then minis them then i think you do the answer of that and minis 8 from it. then that answer minis 10.if this doesn't give you an answer im sorry.