Open Middle®
Directions: Using the integers -9 to 9 at most one time each, fill in the boxes to create two equations. You may reuse all the integers for each equation.
Hint
How can you verify the value of each side?
Answer
There are many possible answers including –9 + 8 = -4 – (-3) and –-4 + 6 = 8 – (-2). Note that I underlined the integers I used as the negative signs made it a bit confusing.
Source: Robert Kaplinsky
Why is this called adding and subtracting rational numbers when it doesn’t include fractions or decimals? If we are limiting the numbers to integers and not all rationals shouldn’t the title reflect that?
Why is this called adding and subtracting rational numbers when it doesn’t include fractions or decimals? If we are limiting the numbers to integers and not all rationals shouldn’t the title reflect that?