Inserting operation symbols.

[Jimbo13]

I have a assignment where I am supposed to insert operating symbols/parenthesis to get a true equation and there are few I couldn't get.


1_ 2_ 3_ 4_ 5 = 3

1_ 2_ 3_ 4_ 5 = 18

1_ 2_ 3_ 4_ 5 = -2



You can use -,+,/,x and parenthesis only where there is a blank.


Thanks for any help, Jim.

 

[soroban]

Hello, Jimbo13!

I have a assignment where I am supposed to insert operating symbols/parenthesis
to get a true equation and there are few I couldn't get.


1_ 2_ 3_ 4_ 5 = 3

1_ 2_ 3_ 4_ 5 = 18

1_ 2_ 3_ 4_ 5 = -2


You can use -,+,/,x and parenthesis only where there is a blank.

\(\displaystyle 1 - 2 + 3 - 4 + 5 \:=\:3\)

\(\displaystyle (1-2+3) \times (4 + 5) \:=\:18\)

\(\displaystyle 1+(2\times3) - 4 - 5 \:=\:-2\)

 

[Jimbo13]

Thanks a million.

 

[Aqualung]

I have this assignment to. Did you get a answer for 1 2 3 4 5 = 12?

 

[mathwannabe]

Hello, Jimbo13!


\(\displaystyle 1 - 2 + 3 - 4 + 5 \:=\:3\)

\(\displaystyle (1-2+3) \times (4 + 5) \:=\:18\)

\(\displaystyle 1+(2\times3) - 4 - 5 \:=\:-2\)

Or:

\(\displaystyle (1+2+3\times4)/5=3\)

\(\displaystyle (1-2+3)\times(4+5)=18\)

\(\displaystyle (1+2+3+4)/-5=-2\)

:cool:

 

[lookagain]

I have a assignment where I am supposed to insert operating symbols/parenthesis to get a true equation and there are few I couldn't get.


1_ 2_ 3_ 4_ 5 = 3

1_ 2_ 3_ 4_ 5 = 18

1_ 2_ 3_ 4_ 5 = -2


> > > You can use -,+,/,x and parenthesis only where there is a blank. < < <

Then the solution of the second exercise by soroban shouldn't count,
and his solution of the third exercise has unneeded parentheses.

And none of the solutions of mathwannabe would count.

You can't have any symbols in front of the 1 or after the 5 if you're to adhere
to the rules, else the OP, Jimbo13, needs to amend the rules.

 

[Walter]

1 - 2 + 3 x 4 - 5 = 3

1 + 2 x 3 + 4 + 5 = 18

1 x 2 - 3 + 4 - 5 = -2

1 + 2 x (3 - 4 + 5) = 12

That was fun, thanks.

 

[pka]

So why didn't we see any answers from you?

Why should he do any of them. Look at the replies.
He gets them all done having done nothing himself.

 

[lookagain]

1 - 2 + 3 x 4 - 5 = 3 . . . Incorrect


1 + 2 x 3 + 4 + 5 = 18 . . . Incorrect


1 x 2 - 3 + 4 - 5 = -2 . . . This one "lucked out," because the
. . . . . . . . . . . . . . . . . . product falls at the beginning of the solution.


1 + 2 x (3 - 4 + 5) = 12 . . . Incorrect
​

Walter, I know that you are not the OP of this thread (unless
you are going by "Jimbo13" and "Walter.") And I don't know if
Jimbo13 posted those alleged solutions in the above quote
box, or you typed them in as Jimbo13, or something else.

The ones marked above as "Incorrect" violate the Order of
Operations.





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