looking for a name for this maths equation

[BigRooster]

Hi everyone i'm looking for a name for this type of maths equation.
83 -17 = 56 + ?
thanks for any help.

[mike11111]

To me it's an arithmetical equation, pure and simple.

[Buenchico]

As a former maths teacher, I can't think of anything other than a 'missing number equation' or a 'missing value equation'.

[DTCwordfan]

A Fail Question?

[Prudie]

'sums'

[mike11111]

I suppose you could call it linear as opposed to quadratic or whatever.

[Buenchico]

Good point, Mike

[Prudie]

It's not really linear as it can't be represented on a graph by a line, it's just a single number (66 in this case)

[mike11111]

Ooh, get you, dear!

[Prudie]

X @ mike

[BigRooster]

its real pain because i'm looking for lots of questions like this to practice .

[Buenchico]

http://tinyurl.com/62juorq

[factor-fiction]

Addition and subtraction. 83 take 17 is 66. What do you add to 56 to make 66? The answer is 10.

It could be regarded as algebra- you could call it "solving a linear equation'.
If you call the missing number y the equation to sollve is 66 = 56 + y.

[DTCwordfan]

and who better titled than factor60 to answer this so-difficult piece of algebraic logic.

I guess we may now see a contribution from those ABers Differentiation, Quadratics orTrigonometry in the next few minutes.

[Prudie]

Factor 60? It is getting hot

[annie0000]

my little boys are doing these sums at the moment and they have the ? represented as a letter and it is part of their algebra book.