It is a Mathematics question.
2007-05-13 19:20:53 · 12 answers · asked by John 1 in Science & Mathematics ➔ Mathematics
19 - (-1) = 19 + 1 = 20
2007-05-13 19:30:48 · answer #1 · answered by Como 7 · 2⤊ 0⤋
19 minus 1 doesn't equal 20. It equals 18.
However, your textbook might been this:
19 - (-1) = 20 (2 negative signs make a positive, so the numbers would be added together)
OR
-1 - 19 = -20
The question isn't very specific...but hope this helps anyway! =D
2007-05-14 02:38:47 · answer #2 · answered by ♥ Victory ♥ 3 · 1⤊ 0⤋
1 is I
19 is XIX
now i will take away 1 from 19. So will get XX which is 20.The trick here is to convert numbers into Roman repesentation.
2007-05-15 10:50:20 · answer #3 · answered by saviour 1 · 0⤊ 0⤋
You weren't very specific in your question. If that is the exact question then whoever gave out the problem needs to be more specific. The answer is either.
-19 minus 1 equals -20
OR
19 minus -1 equals 20
=/ Wish i could help you more. =/
2007-05-14 02:28:09 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Roman number XIX refers to 20 in Decimal
So by taking out I in Roman number XXI we get XX which means 20 in Decimal......
2007-05-14 09:22:17 · answer #5 · answered by sriram t 3 · 1⤊ 0⤋
if 19-(-1) than equal to 20
other method
in roman we can write 19=xix
if sbtract 1 frm xix-i =x x
2007-05-16 01:48:11 · answer #6 · answered by ANJU R 2 · 0⤊ 0⤋
XIX take away I leaving XX i.e. 20
2007-05-14 12:47:10 · answer #7 · answered by Pranil 7 · 1⤊ 0⤋
simple
roman no 1= I
roman no. 19= XIX
roman no. 20= XX
so if you remove 1 (I) from 19 (XIX) it becomes 20 (XX).
2007-05-14 02:49:01 · answer #8 · answered by tamanna k 3 · 4⤊ 1⤋
Except that 19 is XIX not XXI.
2007-05-14 03:07:00 · answer #9 · answered by rethinker 5 · 2⤊ 1⤋
Yes, it is.
XlX-l=XX which is 20 in numeric mythology.
2007-05-14 07:39:48 · answer #10 · answered by Anonymous · 1⤊ 0⤋