2007-01-26 23:30:58 · 11 answers · asked by Dave 4 in Education & Reference ➔ Homework Help
To work this out, remember BODMAS
Brackets
Or
Division
Multiplication
Addition
Subtraction
It is the order in which the sum is best worked out
Therefore
(5 x 4 - 15) = 5
2 x 7 = 14
Your sum will now look as such
42 + 14 - 5 =
To continue
42 + 14 = 56
and finally
56 - 5 = 51
Hope this helps.
Good luck.
2007-01-26 23:43:55 · answer #1 · answered by Spikey and Scruffy's Mummy 5 · 0⤊ 0⤋
42 + 2•7 – (5 • 4 – 15)
42 + 2•7 – (20 – 15)
42 + 2•7 – 5
42 + 14 – 5
56 – 5
51
2007-01-27 09:08:16 · answer #2 · answered by Sam the Man 3 · 0⤊ 0⤋
42 + 2•7 – (5 • 4 – 15)
=42+14-(20-15)
=42+14-(5)
=56-5
=51
2007-01-27 07:40:17 · answer #3 · answered by iyiogrenci 6 · 1⤊ 0⤋
use pemdas to start solving the problem
42+2 x 7 - 5(5 x 4=20-15=5)
42+14(2 x 7)-5
42 +14= 56-5= 51
2007-01-27 09:27:48 · answer #4 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋
well.. you have to remember the fact that in order of Operations remember..
Please
Excuse
MaD
SAlly
Capitals stand for an operation like
P= Parenthesis
E=Exponents
M=Multipication
D= Division
S=subtraction
A=Addition
(note depending on which operation comes first division and mulitplication don't out rank each other smae whith adding and subbtracting.)
so knowing that you always do the stuff in parenthisis first.
since there are two operations in the parenthisis you do the muliplication. then you write the problem again.
so 42 + 2*7 - (20 -15) then you continue with the parenthisis
42+2*7-5, then you do the multiplication,
42+14-5, then you do the addition,
42+14=56-5, then finnaly you do the minusing
56-5=51!!!! 51 is your answer!!!
2007-01-27 08:15:58 · answer #5 · answered by ? 3 · 0⤊ 0⤋
In Maths, a dot represents multiplication. In this case, it would mean:
42 + 2x7 - (5x4 - 15)
We have to solve for the multiplication and bracketed terms first, so it would be:
42 + 14 - (20 - 15)
= 42 + 14 - 5
= 51
2007-01-27 07:38:40 · answer #6 · answered by Universal Studios 2 · 1⤊ 0⤋
51
2007-01-27 07:40:14 · answer #7 · answered by Red Devil 3 · 0⤊ 0⤋
51. Calculate the answer inside the parentheses first and go from there.
2007-01-27 08:40:22 · answer #8 · answered by cytogirl1 3 · 0⤊ 0⤋
51
Good Luck!!!
2007-01-27 07:36:26 · answer #9 · answered by Anonymous · 1⤊ 0⤋
easy boy....
51...
2007-01-27 07:39:31 · answer #10 · answered by westervel 3 · 0⤊ 0⤋