Basic Arithmetic
What number goes in the space marked by a question mark?
(NOTE: Not all number lines have the distance between points be a unit of 1; any scale is possible.)
The number line above shows an operation that is repeating. What could the operation be?
What does the picture above illustrate?
If
\[ \frac{A}{B} = \frac{C}{D} \]
then where is D?
Which of these could be the values of \( A \), \( B \), and \( C \)?