- This topic has 34 replies, 21 voices, and was last updated 4 years ago by joshvegas.

- Scientific cakculator woes!!
- smiththemainmanMember
Hi all sons first secondary school homework,New Casio scientific school calculator 5.2 x 5.2 = 676 over 25 i then try 676 divide by 25 and still end up with 676 over 25 why don’t I get 27.04 either way any homework help much appreciated!!

Posted 4 years agoscaredypantsSubscriber

/thread ðŸ˜‰(I think the modern ones poduce a list of operations that you can combine together, then press “something” to actually perform it)

Posted 4 years agochudsyMemberIs there a sd button on it. Should convert the answer from a fraction to a decimal.

Posted 4 years agosmiththemainmanMemberHappy days chudsy, legend!!!

Posted 4 years agofozzieMemberI think I set my Casio to use decimals by default by pressing/selecting shift-mod-stat but it was a while ago and I am sure your son would have a newer model.

Posted 4 years agosmatkins1MemberI wouldn’t be putting his calculator into stats mode, could cause him other moments of confusion. He should be fine now he knows about the S<->D button. At least now if he gets given a calculator which isn’t his one (e.g. in an exam) he’ll know what to do.

I bet not knowing about the S<->D button has disheartened many a pupil and parent in recent years. It’s good he now knows about it.

Anyway shouldn’t he be doing this without a calculator though ðŸ˜‰ An ideal opportunity to help him on his way by making sure he can multiple decimal numbers.

Posted 4 years agosmiththemainmanMemberCheers folks, it was finding out how far each grand prix was , lap length ie 5.987km x laps , that was just my basic example!! There were 20 , 15 with calc and 5 long hand, we are free to play now!!!

Posted 4 years agoRaveyDaveyMemberThat fx-39 brings back memories. I remember upgrading to an fx-450 because it had boolean operators on it even though i didn’t know how to use them at the time.

Posted 4 years agoCaptainFlashheartMember5318008

Posted 4 years agoCountZeroSubscriberCaptainFlashheart – Member

5318008There’s always one, isn’t there!

Posted 4 years agoCaptainFlashheartMemberThey usually come in pairs, but otherwise, yes.

Posted 4 years agoCHBSubscriber50337 …with modern calculators having dot matrix displays, the days of spending maths lessons trying to spell words upside down are dwindling.

Posted 4 years agojoshvegasMemberIf you knew the answer was 27.04 all along why did you need to use a calculator?

Posted 4 years agoprettygreenparrotSubscriberAh the Casio fx-450. I tried to get my son to take that to school the other day when he revealed that his fx-83 had mysteriously died. He resisted and picked up a fresh fx-83 from a store later in the week for <Â£10.

Posted 4 years agoCougarSubscriberStill have mine (actually I think it’s an FX-451, broadly the same thing though IIRC).

Posted 4 years agorevs1972Membercurrently using my Casio FX 992s . Still going strong after 25 years, most of the numbers have rubbed off over time , but you just know where they are.

Posted 4 years ago

Bought because it could do pythagoras simply by pressing the SHIFT then + button when adding up the 2 sides !ffejSubscriberI’ve just stuck new batteries into my Casio FX-7000 – It’s still be mutts nuts after all these years.

Not sure I can remember how to program it or draw graphs, but it’s still be best for basic adding up by being able to back track and correct errors.Jeff

Posted 4 years agoBigButSlimmerBlokeMemberHow about [SHIFT][=] to get the answer?

Posted 4 years agosmiththemainmanMemberRead the full thread joshvegas ðŸ™‚

Posted 4 years ago

Will look at BBSB thanks.

Bought a Texas Instrument calc in about 1979 for I think it was nearly Â£30 and never worked correctly to far ahead of its day I think!!johndohMemberI have a Casio FX – bought when I was 16, still has the formula for quadratic equations scratched in the back (never did get caught on that one ðŸ™‚

32 years on it still gets quite regular use and is somehow still on the original Casio batteries it shipped with.

Posted 4 years agorichmarsSubscriberCasio calcs are rubbish!

Posted 4 years ago

Real geeks have HP.gonefishinMemberCasio calcs are rubbish!

Real geeks have HP.Liking RPN is nothing to boast about.

Posted 4 years agoIAMemberCasio calcs are rubbish!

Real geeks have HP.TI FTW.

Posted 4 years agoCougarSubscriberLiking RPN is nothing to boast about.

Don’t you mean:

boast about. nothing to is Liking RPN

Posted 4 years agojoshvegasMemberRead the full thread joshvegas

I feel you missed the gist…

767/25 is how I would leave it as its perfectly correct.

Trust me I have almost a whole maths degree.

Posted 4 years agoBigButSlimmerBlokeMember767/25 is how I would leave it as its perfectly correct.

Not if the question is to express the answer to x significant digits or as a percentage it’s not.

Posted 4 years agoBigButSlimmerBlokeMemberTI FTW.

TI84 Plus or Silver for hardcore calculator geekery

Posted 4 years agorichmarsSubscriberDon’t you mean:

boast about. nothing to is Liking RPN

+1, or even 1 +

Posted 4 years agoCougarSubscriberBack at school, we used to refer to RPN as “egdelp.” But then I’m easily amused.

Posted 4 years agosmiththemainmanMemberI trust you to read the question correctly josh in order to cross the finishing line for the degree it was 676/25, 767/25 is not perfectly correct ðŸ˜€ ðŸ˜€

Posted 4 years agomolgripsSubscriberI didn’t even know they still made these things!

Posted 4 years agogonefishinMemberI didn’t even know they still made these things!

For simple calculations they are still the best device out there. Even with a powerful PC at my desk and a smartphone, my 20+ year old calculator is still a go to device.

Posted 4 years agojoshvegasMemberBigButSlimmerBloke – Member

767/25 is how I would leave it as its perfectly correct.Not if the question is to express the answer to x significant digits or as a percentage it’s not.

Excellent point, I showed my working though so at most I dropped one mark.

Posted 4 years agoChubbyBlokeInLycraMemberSo not “perfectly” correct then?

Posted 4 years agojoshvegasMemberI did say almost a degree in maths ðŸ˜›

Mathematically it is perfectly correct and actually easier to use than stupid decimals that need a calculator.

Jesus is the an englush exam?

Posted 4 years ago

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