In parts (a) and (b) below, copy the vertical number lines and use them to show the solution to the problems.
Show how to find the answer to
on a number line.
See parts (a) and (b) for help.
Rachel said that
ends up being positive because two negatives always give a positive. Draw the problem on a number line, and then explain whether you agree or disagree with Rachel.
Do two negatives always make a positive?