Go Back  PPRuNe Forums > PPRuNe Worldwide > South Asia and the Far East
Reload this Page >

Hours/Minutes on Scientific Calculator

South Asia and the Far East News and views on the fast growing and changing aviation scene on the planet.

Hours/Minutes on Scientific Calculator

Old 8th Jul 2010, 08:23
  #1 (permalink)  
Thread Starter
 
Join Date: Oct 2007
Location: somewhere along the equator
Posts: 124
Hours/Minutes on Scientific Calculator

Could somebody kindly walk me through how exactly to input hours and minutes, on the scientific calculator?
I have the Casio fx-82MS.

For instance, how do I add 1 hour 30 minutes to 42 minutes to give me 2 hours 12 minutes?

Thanks
matthewgamm is offline  
Old 8th Jul 2010, 10:01
  #2 (permalink)  
 
Join Date: Mar 2007
Location: at home
Posts: 6
1:30+0:42=2:12

Type 1 then press ''' (''' is button to the left of HYP and above ENG)
Type 3 and 0 then press ''' again.
This will display 1.5 (decimal form)
Now press SHIFT (left upper most button) and press '''
This should display 1'30'' ( hr and min)

Press + then type 0 then press ''' again.
Type 4 and 2 then press '''
This will display .7 (decimal form)
Press SHIFT then press ''' to display 0'42''(hr and min)
Press =
This should give the answer in decimal form
Press SHIFT then press ''' to view in hr and min.

You may ommit SHIFT ''' to add in decimal form and after the sum is displayed press SHIFT''' to display it in hr and min.

I hope this helps
overview is offline  
Old 8th Jul 2010, 10:58
  #3 (permalink)  
 
Join Date: Mar 2006
Location: philippines
Age: 55
Posts: 21
on an ordinary calculator try this:

lets say you want to add 1:35 and 1:36

substitute the":"with a "0"

so punch in 1035 +1036 you'll get 2071

add 940 you'll get 3011 ,replace the "0" with a ":" again

and get 3:11

hope this helps if you cant find your scifi calculator
nandyg1 is offline  
Old 8th Jul 2010, 12:11
  #4 (permalink)  
 
Join Date: Jan 2010
Location: india
Age: 56
Posts: 68
nandyg1
cool!
stubby1 is offline  
Old 8th Jul 2010, 13:47
  #5 (permalink)  
 
Join Date: Mar 2007
Location: at home
Posts: 6
works on any calculator. still using this untill now, nice nandyg1
overview is offline  
Old 8th Jul 2010, 13:52
  #6 (permalink)  
Thread Starter
 
Join Date: Oct 2007
Location: somewhere along the equator
Posts: 124
Thanks guys!

@overview, what does pressing Shift and "' accomplish?
For instance, if I am to follow the steps you mention, I get 2 hours 12 minutes; however, I also arrive at 2 hours 12 minutes, if I don't press Shift and "'
1"30" + 0"42" = 2"12"
matthewgamm is offline  
Old 9th Jul 2010, 07:13
  #7 (permalink)  
 
Join Date: Mar 2007
Location: at home
Posts: 6
Pressing SHIFT and ''' just changes the display from decimal form to hours and minutes...for double checking if you punched in the correct figures(you may skip this if you know for sure that 1.5 is 1'30'').
overview is offline  
Old 10th Jul 2010, 10:55
  #8 (permalink)  
 
Join Date: Apr 2007
Location: OMAA
Posts: 253
@nandyg1 that was cool!
what is this called? the 940rule?
aditya104 is offline  
Old 11th Jul 2010, 09:56
  #9 (permalink)  
 
Join Date: Nov 2008
Location: Southern Hemisphere
Age: 57
Posts: 9
@nandyg1: That's excellent! Thanks.
Engine Wizard is offline  
Old 13th Jul 2010, 05:44
  #10 (permalink)  
 
Join Date: Dec 2004
Location: HCMM
Posts: 48
@nandyg1 Is there a limitation

Eg 14:10 and 12:10
It doesn't seem to add up

Maybe its for single digit time situ

Pls verfiy

OC
OpsControl is offline  
Old 25th Jul 2010, 10:11
  #11 (permalink)  
 
Join Date: Aug 2007
Location: India
Posts: 16
940 rule

The 940 only needs to be added if the sum of the minutes digits is more than 60.

It works out fine for even two or greater digit hours..

14:58 + 12:56

14058 + 12056 = 26114 + 940 = 27054 = 27:54


14:15 + 15:13 = 14015 + 15013 = 29028 = 29:28 (no need to add 940)

However the limitation is that only two figures can be added one at a time. More than that you need to do it in multiple steps.

But, really cool otherwise
flyingsolo is offline  
Old 15th Jul 2021, 03:24
  #12 (permalink)  
 
Join Date: Jul 2021
Location: Tucson
Posts: 1
Is there an easy way to subtract time?
andrea5 is offline  
Old 18th Jul 2021, 14:50
  #13 (permalink)  
 
Join Date: Jul 2010
Location: Australia
Posts: 9
Originally Posted by matthewgamm View Post
Could somebody kindly walk me through how exactly to input hours and minutes, on the scientific calculator?
I have the Casio fx-82MS.

For instance, how do I add 1 hour 30 minutes to 42 minutes to give me 2 hours 12 minutes?

Thanks
press the button under the magenta B. so 1⁰30⁰+ 0⁰42⁰
reflector is offline  
Old 19th Jul 2021, 12:17
  #14 (permalink)  
 
Join Date: Dec 2005
Location: Wherever I lay my hat
Age: 43
Posts: 3,086
Originally Posted by OpsControl View Post
@nandyg1 Is there a limitation

Eg 14:10 and 12:10
It doesn't seem to add up

Maybe its for single digit time situ

Pls verfiy

OC
Adding 940 is really a way of saying "take away 60 and add 1000" - where the last two digits represent the minutes and the thousands represent the hours. You can add as many numbers as you like, you just keep adding 940 until the "minutes" drop below 60.

For an easy example 1:50+1:50+1:50+1:50
Would be 1050+1050+1050+1050 = 4200
Add 940 = 5140
Add 940 = 6080
Add 940 = 7020 (7:20)

Although DM'S" on a scientific calculator is easier!
rudestuff is offline  
Old 19th Jul 2021, 12:55
  #15 (permalink)  
 
Join Date: Jul 2021
Location: FL95
Posts: 4
Crickey!
Never thought about this!

Have one of the old Casios in my bag - it has been a trusty comrade for a long time and needs one AA battery per decade.
However that DMS button was always too clumsy for me, so I used to convert everything to minutes in the coprocessor behind the eyeballs.
I will opt for the option of adding one page up and than doing a +3000-180, +4000-240 or +5000-300 which will have me most likely covered most of the time.
C2H5OH is offline  
Old 20th Jul 2021, 08:31
  #16 (permalink)  
Rug
 
Join Date: Aug 2020
Location: Lounge
Posts: 14
Worth noting this thread was started 10 years ago.

If the point of the original question was to assist with adding up logbook hours then there are numerous free Hours and Minutes calculator apps in the App Store / Google Play you can use which make life much easier.
Rug is offline  
Old 20th Jul 2021, 14:05
  #17 (permalink)  

Avoid imitations
 
Join Date: Nov 2000
Location: Wandering the FIR and cyberspace often at highly unsociable times
Posts: 13,342
On a basic calculator I've always converted hours and minutes to minutes to add them.

Divide the answer by 60 to get hours and decimal hours. Note then subtract the total hours, then multiply the remaining answer by 60 to convert it back to minutes. Sometimes you need to round the answer up/down to the nearest minute, but it's near enough for government work.
ShyTorque is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.