Is this in an algebraic form? I got this wrong on a test, and somehow I came up with -16.08 . Problem is, this test was 4 weeks ago, and I did not show my work. What did I do wrong?
2006-09-24 06:50:22 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Well u just did a very silly and basic mistake. In algebra minus-minus become plus. Therefore in ur sum the ans should come 1.92.
-7.08 - (-9) = -7.08 + 9 = 1.92.
You can confirm this by using Ms Excel worksheet. There in a cell u type: = (-7.08 - (-9)) like this only and press enter u will get the correct ans.
Ok buddy.
Enjoy Maths.
2006-09-24 06:57:27 · answer #1 · answered by smilingbook1 2 · 0⤊ 0⤋
when you subtract a negative number you are actually adding it.
So what you should do is:
-7.08 - (-9) = -7.08 + 9 = 9 -7.08 = 1.92
2006-09-24 13:55:30 · answer #2 · answered by animal 2 · 0⤊ 0⤋
- 7.08 - (- 9)
- 7.08 + 9 =1.92
when a negative ( - ) sign precedes the parenthesis all signs change from - to +
2006-09-24 14:59:09 · answer #3 · answered by SAMUEL D 7 · 0⤊ 0⤋
-7.08 - (-9) = -7.08 + 9 = 1.92
2006-09-24 13:54:44 · answer #4 · answered by عبد الله (ドラゴン) 5 · 0⤊ 0⤋