### Home > MC2 > Chapter 2 > Lesson 2.1.2 > Problem2-30

2-30.

In parts (a) and (b) below, copy the number lines and use them to show the solution to the problems.

1.                          $5 + (-2)$

The answer is where the point moves to.

$3$

1.                         $2 - (-1)$

1. Show $-3 + 4 + (-1)$ on a number line.

See parts (a) and (b) for help.

2. Rachel said that $-4 + (-3)$ will be positive because two negatives always give a positive. Draw the problem on a number line, then explain whether you agree or disagree with Rachel.

Explain why a negative number plus a negative number is always a negative number.

$-1 + (-2) = -3$
$-7 + (-4) = -11$