Question

help please @ganeshie8 @e.mccormick
@amistre64 @AravindG

Answer 1

Order of operations. What would come first? That is the big key here.

Answer 2

PEMDAS, or Please Excuse My Dear Aunt Sally

Parenthesis
Exponents
Multiplication and Division
Addition and Subtraction

Start at the top and work to the bottom. So, do you see any Parenthesis? If not, go on to Exponents and so on.

Answer 3

start with the last one?

Answer 4

If by last you mean: \(.1^2\) YES! Exactly.

Answer 5

so that divided by the number next to it?

Answer 6

i got a longgggg number
\

Answer 7

Well, not quite. The .01 you get from squaring is on the left, so it divides, not the other way around.

Answer 8

\(9.0073+0.07\div 0.1^2 \implies 9.0073+0.07\div 0.01\)
so
\(9.0073+\cfrac{0.07}{0.01}\)

Answer 9

so it becomes a fraction?

Answer 10

so basically i use whats there?

Answer 11

Well, it means the same thing. I am just showing it to point out what the \(\div\) symbol means.

Answer 12

so that is the answer then right?

Answer 13

No, it is the next step. Do the division and see what you get.

Answer 14

i got 7

Answer 15

Exactly! So now...
\(9.0073+7\)

Answer 16

One last step.

Answer 17

16.0073

Answer 18

is that the answer

Answer 19

Yep!

Parenthesis \(\leftarrow\) None so skipped
Exponents \(\leftarrow\) Did that
Multiplication and Division \(\leftarrow\) The one division
Addition and Subtraction \(\leftarrow\) That last addition!

All done just by going through PEMDAS.

Answer 20

can you help with this i really appreciate it

Answer 21

Same rules. What do you think you need to do first?

Answer 22

parenthesis

Answer 23

i got 6.994

Answer 24

Yes. So you do evertyhging inside the ( ) first. Then rewrite the equation with that as something new based on what happens.

Answer 25

ok

Answer 26

OK. So, with the \((6.994)^2\div 2+8.4\times 0.8\) what happens now?

Answer 27

the exponent

Answer 28

Exactly. And that makes it?

Answer 29

48.916036

Answer 30

=)
\(48.916036\div 2+8.4\times 0.8\)
Next?

Answer 31

And a side note here, Multiplicaton and Division happen at the same level of PEMDAS, so you do them left to right.

Answer 32

ok

Answer 33

19.5664144+8.4?

Answer 34

Not sure how you got there. Perhaps hit a wrong key or two on a calculator?

Lets look at just the division part for a moment.
\(48.916036\div 2\)
What is just that part?

Answer 35

24.458018

Answer 36

\(24.458018+8.4\times 0.8\)
So now you need to look at the right side:
\(8.4\times 0.8\) and get that part done.

Answer 37

6.72

Answer 38

Yes! That is doing Multiplication and Division left to right. We did the left part, then the right part, and now we have this:
\(24.458018+6.72\)

Answer 39

31.178018

Answer 40

Yep! And that is it.

Answer 41

your the best im going to you from now on

Answer 42

Well, you did the work here!

Answer 43

:)