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smclean23
- Master | Next Rank: 500 Posts
- Posts: 172
- Joined: Mon Jun 23, 2008 12:00 pm
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8 – [7 – (6 – 5 × 4 + 3) – 2 + 1] =
-11
-9
-1
13
21
Here is the explanation from MGMAT, my confusion is in CAPS....
The expression
8 – [7 – (6 – 5 × 4 + 3) – 2 + 1]
can be simplified as follows:
= 8 – [7 – (6 – 20 + 3) – 2 + 1] by first multiplying within the parentheses..... SHOULDN'T -20+3 BE SOLVED BEFORE 6-20?
= 8 – [7 – (-11) – 2 + 1] by performing the rest of the arithmetic in the inner parenthesis
= 8 – (7 + 11 – 2 + 1) by changing the sign of the -11 and converting operations (– to +). AGAIN, SHOULDN'T 7+11 AND -2+1 BE SOLVED FIRST?
= 8 – 17 by simplifying within the parentheses sequentially
= -9[/b]
-11
-9
-1
13
21
Here is the explanation from MGMAT, my confusion is in CAPS....
The expression
8 – [7 – (6 – 5 × 4 + 3) – 2 + 1]
can be simplified as follows:
= 8 – [7 – (6 – 20 + 3) – 2 + 1] by first multiplying within the parentheses..... SHOULDN'T -20+3 BE SOLVED BEFORE 6-20?
= 8 – [7 – (-11) – 2 + 1] by performing the rest of the arithmetic in the inner parenthesis
= 8 – (7 + 11 – 2 + 1) by changing the sign of the -11 and converting operations (– to +). AGAIN, SHOULDN'T 7+11 AND -2+1 BE SOLVED FIRST?
= 8 – 17 by simplifying within the parentheses sequentially
= -9[/b]
