Question

Addition using Precision Rule

98.450 + 120.55

Answer 1

so do you just have to add them?

Answer 2

No, you do not.

Answer 3

just add another 0 at the end of 98.45 then add them

Answer 4

then what do you do?

Answer 5

omg

Answer 6

It's 219 if you just add them

Answer 7

remove all the points then add them then at the end you will but them back

Answer 8

after a quick google search it seems its just addition with decimals... so yeah just add them

Answer 9

http://mathforum.org/library/drmath/view/58335.html

Answer 10

She is just playing guys

Answer 11

It is hard to explain. The precision rule basically tells us that we do not know if it is actually a 0 that goes in that spot, it could be great than . I have to round my number based on that, and I am entirely confused about it.

Answer 12

It is technically Chemistry, but it is a statistic rule (based on what my professor told us today)

Answer 13

There shouldn't be any confusion, the zero is there as a temporary place holder. Just search up a calculator on google and add it up.

Answer 14

why do you need a link? All you do is add a 0 to the end of 120.55 and add them together.

Answer 15

Is this like significant figures?

You see which number has the numbers after the decimal and add until there

Answer 16

Don't forget significant figures too

Answer 17

Do the least significant figures in the problem

Answer 18

2 + 2 = 5

Answer 19

since you guys can't figure it out, i'll do it in my head: 219

Answer 20

Exactly lol @brainzonly

Answer 21

Try just 219

Answer 22

Yes, it has to do with the signifcant figures. I know the multiplication and the division, but the addition and subtraction is VERY confusing to me @TheSmartOne

Answer 23

@ageta What the freak? is this like some new Common Core joke????

Answer 24

https://www.khanacademy.org/math/arithmetic-home/arith-review-decimals/arithmetic-significant-figures-tutorial/v/addition-and-subtraction-with-significant-figures

Answer 25

on it is not

Answer 26

WHAT!!!???????????????????????????????????????????????????????

Answer 27

http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch1/sigfigs.html

Answer 28

The example he gave us in class was 23.0 + 24.23 and that would be 47.2.

Answer 29

*no

Answer 30

It's just sig figs

Answer 31

2+2=4!!

Answer 32

ohh i know what you are talking about

Answer 33

He took the least number of sig figs, use the two websites I provided for you :)

Answer 34

No it is no @brainzonly

Answer 35

because 23 has only one digit after the decimal spot we have to use that

we use the least amount of digits after the decimal spots of the two numbers

Answer 36

Exactly! @TheSmartOne

Answer 37

No that is just a theory

Answer 38

What I am confused about is 98.450 +120.55 would come out to be 219, but it would have to be two degree precision?

Answer 39

So maybe round to 220?

Answer 40

Leave the zero

Answer 41

that's two sig figs

Answer 42

Would I just make it out to be 219.00?

(He told us that SF had nothing to do with addition and subtraction)

Answer 43

we only go 2 digits after the decimal spot