How to Determine Significant Figures and Use Sig Fig Rules

Significant Figures and Using Sig Fig Rules. Mr. Causey explains the importance of significant figures and demonstrates how to determine, recognize and write significant figures or sig figs.
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Mr. Causey explains the importance of significant figures and demonstrates how to determine, recognize and write significant figures or sig figs. Also learn the rules for determining the significant figures in calculations. Using sig figs in your calculations helps to maintain the integrity of your data. As you begin to add, subtract and multiply you also introduce error. It is the significant figures that help maintain the balance.

[@purplepineapple6443]

OMG UR A LIFE SAVER!!!!!!!!!!!!!! I have a chemistry quiz tomorrow! Wow lol you explained it better then my teacher:)

[@mrcausey]

Thank you so much for the kind words. I am so glad the video was useful. Sometimes it just helps to have a third party explain it.

[@rufamaedomeguera4944]

What if you will round off 5654.7 to 3 sig. Figures? Will 4 turn to 5 then 5 will turn to 6 or since 3 significant figures is ask, will I not consider the 7 and so, 5 wil stay as it is? What would be the answer? 5660 or 5650?

[@mrcausey]

If you only have three sig figs the answer would be 5650

[@mrcausey]

In measurements and data collection there is an important difference between an assumed decimal point and a written decimal point. There is always an assumed decimal point but when collecting data a written decimal point means that the tool being used to measure has a certain precision. 200 means that the tool was not very precise and not very useful. However, 200.0 means that the tool could measure to the tenths place and allowed for a certain amount of precision.

[@Starlightkitty12]

Thank you! The practice questions at the end were especially helpful :)

[@KomperdaJ]

Thankyou soo much this helped sooo much!!! your awesome

[@NepZDude]

Thanks a LOt !! Good voice and nice Video !! Helped me a lot!!

[@Abnerben1]

I laughed so hard when you said that our data is only as good as the instruments we use and the idiot using them!

[@palsfile]

Thank you so much, helped me a lot!

[@mrcausey]

You're welcome.

[@sierrahamilton632]

Thank you so much! I was so lost!

[@mrcausey]

You're welcome.

[@arpinemanukyan9458]

Thank you for the great video! Helped a lot!

[@mrcausey]

If I understand correctly, your tool is divided to the tenths which means you can make an estimate in between the tenths. Sig figs are all the numbers you can read plus one estimate, in your case the 100ths. Therefore, 26.55 or 26.53 are both correct.

[@ZOMBIESLAYER9973]

Love the videos, They really help me in school. Keep it up!

[@julibean63]

thanks so much! this was so helpful!

[@trishasales714]

Could you please explain this to me? The smallest division of a measurement is 0.1, maximum precision is 0.05 and 26 is a certain number of the measurement. The safest measurement is 26.5. Why would the maximum measurement be 26.50? Could it also be 26.55 or 26.60 or does it have to be 26.50? I hope the question makes sense. Thanks.

[@kkk6683]

Thanks great video helps so much keep it up!!!!!

[@saral3xi]

Thank you for the practice it helped a lot! :)

[@mrcausey]

7.500 has four sig figs. 1.000 is four sig figs. Zeroes after the decimal count if they are not leading zeroes.

[@duses2k7]

Thankkkk youuu soooo much !!

[@07natalias]

Thank you!!!

[@karahartman1017]

This video helped so much thanks

[@CeeBallaBlockin]

So from 26.50 to 26.59 are all correct answers right? Thanks for the video man , it was really helpful.

[@LovelyKelz]

U r great, now I understand this! :)

[@trishasales714]

How would 26.53 be correct? Doesn't it have to have 5 or 0 in it's hundreth's place considering the maximium precision is 0.05?

[@ZombiePixi]

Can u please help me out in this question I have the number 7.500 is that only 4 sig figs or 2 ? Also what about 1.000 do the zeros afer he decimals count?

[@WestVirginiaPatriot]

Love your videos! Thank You sir!!!!!

[@mrcausey]

Thank you for watching!

[@ani7646]

I love your videos~ Helps me so much with my AP Chem T^T

[@scp_dr_lance711]

"Our data is only as good as the tools and the idiot using it." - Mr. Causey. 2011. Video part: 0:45. Brilliant quote.

[@ThisaleeUK]

Thank you 🙂

[@mrcausey]

You're welcome! Thank you so much for watching.

[@alexandriacarney7881]

Thank you sooo much. I am in Chemistry and did not understand any of it, but because of you I do. Thank you sooooooo much!

[@mrcausey]

You'rre welcome. Thank you for watching and the great feedback.

[@timbruse]

I'm confused as to why: In the sum of 54.34 + 45.66, the number of significant figures is 6. Isn't 4 sig fig the least precise used in the addition?

[@mrcausey]

The rule for addition is based on least precise place value not number of sig figs. Thus in 54.34 + 45.66 the sig figs would go to the hundredths.

[@timbruse]

Would that have 100.000 as the answer, and therefore, 6 sig figs?

[@mrcausey]

5 sig figs 100.00

[@timbruse]

Thank you Mr. Causey!

[@mrcausey]

You're welcome.

[@GurkaranMalhans]

great

[@mrcausey]

Thank you!

[@J03y805]

helpful video!

[@lo_kiigaming]

I like how you casually slide in "AND the idiot using them!"

[@mrcausey]

The last digit is your best guess.

[@CrazyyThing101]

thanks :D

[@totheworld412]

This video angers me to an extent. There is ALWAYS a decimal in a number! 200 is the same thing as 200.0. WHAT'S THE DIFFERENCE?!

[@globalchaos1984]

Why is the reason sig fig rule 5 is the case?

[@Weddingcontentcreator-jia]

thanks brooo ur hott

[@sulfie7168]

How about 3.000? Pls i have exam tomorrow

[@darrellcauseyjr.8595]

Four significant figures.

[@sulfie7168]

Darrell Causey Thank you so much! Life saver :D

[@immabignerd]

+Darrell Causey (Mr. Causey) If there was number after the zero. example 3.0005 would it be 2 significant figures since the zeros are place holders or would it be 5 significant figures? Also would 8200 be 2 sig figs and 8200. be 4 sig figs since there is a decimal?

[@darrellcauseyjr.8595]

Five sig figs because zeros in between significant figures are significant. In the second example twice sig figs and four sig figs

[@darrellcauseyjr.8595]

3.000 has four sig figs. Zeros after the decimal are significant.