Open Middle®
Directions: Using the digits 1 to 9, at most one time each, place a digit in each box to make the equation true.
Hint
What does absolute value mean? How does that relate to two numbers? How would that relate to equality?
Answer
There are many possible solutions. One example would be 3 + 4 = | 2 – 9 |
Source: Bryan Anderson
I don’t find this problem SO worth solving, as the absolute value is not needed (the digits of the subtraction can be arranged in any order to create a positive value).
It would be much more interesting if the 7 selected digits were asked to be arranged from least to greatest in a sentence like this: ____ + ____ ____ = | ____ ____ – ____ ____ |
I don’t find this problem SO worth solving, as the absolute value is not needed (the digits of the subtraction can be arranged in any order to create a positive value).
It would be much more interesting if the 7 selected digits were asked to be arranged from least to greatest in a sentence like this: ____ + ____ ____ = | ____ ____ – ____ ____ |
I adjusted the problem by adding a negative sign inside the absolute value sign: ____ + ____ = |-____ + ____|
3+4 = 2-1
I did 7+1= (1-9)
I did 1+7=(1-9)
3+4 = 2-1
7+1-= (1-9)
i did 4+3 = (9-1)