Math, help please ? ?

Question

ok, i had this question on a PSSA's in 6th grade (im advanced in math) and my math teached couldnt even do it (i was the only one with this f-ing question)

keeping the problem the same in the blanks insert add subtract mutiply of divide to make the statement true.....the one minus sing is supposed to be there

78 (25_9)=78_20_78_5-78_9

Answer 1

I guess that I am missing something: Is this difficult?

On the left is 78 operator (25 operator 9)

on the right everything is preceded by 78.

Multiplication is distributive over addition, so take 78*

now make (25 operator 9) the same as 20 operator 5 operator 9

So maybe

20 + 5 operator 9

78 * (25 + 9) = 78 * 20 + 78 * 5 + 78 * 9

78 * (25 - 9) = 78 * 20 + 78 * 5 - 78 * 9

Maybe you can prove there are no others with normal precedence rules?

Or have I misunderstood?

Answer 2

78 [25-9] = 78x20+78+5-78-9{-78 and +78 will be cancelled  and 20 and 5 will be added and this should be subtracted by 9}

78x16 = 78x25-9

78x16 =78x16

1248=1248

ps:you can also add 25 and 9

hope i helped you.toodles!

Answer 3

78*(25-9)=78*20+78*5-78*9