# Hours/Minutes on Scientific Calculator

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

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

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

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

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

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

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"

@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"

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

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

Join Date: Jul 2010

Location: Australia

Posts: 9

press the button under the magenta B. so 1⁰30⁰+ 0⁰42⁰

Join Date: Dec 2005

Location: Wherever I lay my hat

Age: 43

Posts: 3,086

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 D°M'S" on a scientific calculator is easier!

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.

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.

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.

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.

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.

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.