I'm back for a day-and maths is my way!
The Imperial Navy
13-06-2005, 10:54
Yes, yes i'm back for this day only, but I also have work to do. But i've decided to give you a maths problem to solve. and to stop you from using the calculator, you must SHOW YOUR WORKING.
Ok folks, lets give it a go!
Question 1: 9485 ÷ 13 (And remember, SHOW YOUR WORKING.)
1st prize is a frozen turkey head!
The Imperial Navy
13-06-2005, 11:01
BAH! Where is your intellect?
The Imperial Navy
13-06-2005, 11:11
Do none of you even care that I am here? I'm just trying to challenge your mind!
Lumberjack Arsonists
13-06-2005, 11:13
Yes, yes i'm back for this day only, but I also have work to do. But i've decided to give you a maths problem to solve. and to stop you from using the calculator, you must SHOW YOUR WORKING.
Ok folks, lets give it a go!
Question 1: 9485 ÷ 13 (And remember, SHOW YOUR WORKING.)
1st prize is a frozen turkey head!
Oooh, a turkey head.
13 x 7 = 91
94 - 91 = 3
13 x 2 = 26
38 - 26 = 12
13 x 9 = 117
125 - 117 = 8
Answer: 729 Remainder 8 OR
13 x 6 = 78
80 - 78 = 2
13 x 1 = 13
20 - 13 = 7
13 x 5 = 65
70 - 65 = 5
13 x 3 = 39
50 - 39 = 11
729.6153. It goes on, but I've done waaaaay too much work already.
Commie Catholics
13-06-2005, 11:16
Are you asking us to turn it into a decimal? Cause I never leave anything as a decimal approximation. It always has to be exact.
The Imperial Navy
13-06-2005, 11:17
Correct! A turkey head is on it's way!
Next: -84 ÷ 7
Pure Metal
13-06-2005, 11:17
booya TIN :)
The Imperial Navy
13-06-2005, 11:18
Are you asking us to turn it into a decimal? Cause I never leave anything as a decimal approximation. It always has to be exact.
To at least 3 decimal places per answer please.
Lumberjack Arsonists
13-06-2005, 11:21
Easy.
-84 divided by 7. Ahem,
7 x 1=7
8-7=1
7 x 2= 14
14 -14 = 0
Answer: -14.
The Imperial Navy
13-06-2005, 11:29
Easy.
-84 divided by 7. Ahem,
7 x 1=7
8-7=1
7 x 2= 14
14 -14 = 0
Answer: -14.
Wrong. The answer is -12.
Lumberjack Arsonists
13-06-2005, 11:32
Wrong. The answer is -12.
Oops. Crap!
The Alma Mater
13-06-2005, 11:34
Next: -84 ÷ 7
No new one because (s)he made he writing error ?
Ohwell:
84 - 70 = 14
14 / 7 = 2
10 + 2 = 12.
So -84 / 7 = -12
Multiplication next ;) ?
The Imperial Navy
13-06-2005, 11:36
Sorry. was a little busy.
2766 x 198
Lumberjack Arsonists
13-06-2005, 11:40
No new one because (s)he made he writing error ?
Ohwell:
84 - 70 = 14
14 / 7 = 2
10 + 2 = 12.
So -84 / 7 = -12
Multiplication next ;) ?
Uhh, for future reference, I'm a guy.
Lumberjack Arsonists
13-06-2005, 11:43
Sorry. was a little busy.
2766 x 198
But, anyway,
8 x 6 = 42
Carry the...
Eh, I'm sick of doing math problems.
The Alma Mater
13-06-2005, 11:48
2766 x 198
First I turn it around:
198 x 2766
Now I half the left side multiple times until I reach 1, ignoring fractions, and double the right side the same amount of times:
198 | 2766
99 | 5532
49 | 11064
24 | 22128
12 | 44256
6 | 88512
3 | 177024
1 | 354048
Now I remove all the rows with even numbers on the left side and add the remaining numbers on the right side:
99 | 5532
49 | 11064
3 | 177024
1 | 354048
2 + 4 + 4 + 8 = 18, write 8, carry 1
1 + 3 + 6 + 2 + 4 = 16, write 6, carry 1
1 + 5 = 6
5 + 1 + 7 + 4 = 17, write 7, carry 1
1 + 1 + 7 + 5 = 14, write 4, carry 1
1 + 1 + 3 = 5
So 198 x 2766 = 547668
Now you explain my method :P
The Imperial Navy
13-06-2005, 12:00
Dang. Thats correct too. :eek:
The Imperial Navy
13-06-2005, 12:01
Ok thats enough maths. My head hurts. :D
The Alma Mater
13-06-2005, 12:04
Dang. Thats correct too. :eek:
Of course - the method is sound ;) Have fun trying to figure out why :p
Hint: one should be one with the calculator.