Consider 16–20.5. What is the solution? Represent the subtraction on a horizontal number line diagram.

Answer 1

16 - 20.5 = -4.5

The subtraction can be represented on a horizontal number line diagram as follows:

-5 -4 -4.5 -3 -2 -1 0 1 2 3 4
|____|____|_____|____|____|____|____|____|____|____|____|____|
^
16 - 20.5 = -4.5