CPM Homework Help : MC2 Problem 2-40

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2-40.

Simplify the following expressions. Show your work.

$8-(-10)$
Hint (a):
Represent these values with + - tiles to find out what is left.
Notice that the - tiles cancel out and you are left with $18 +$ tiles.

$-6-9$
Hint (b):
See (a).
Answer (b):
$−15$

$8-3 + (-4)$
Hint (c):
More Help (c):
Look at the number line. Put your finger at $8$ and move it to the left $3$ , then move it to the left $4$ . Where do you land?

$0-(-3)$
Hint (d):
See (a).

$15 – 20$

$–9 + 14$
Hint (f):
See (a) or (e).

$11 + \left(–7\right)$
Hint (g):
See (a) or (e).

$5 – 9$
Hint (h):
See (a) or (e).
Answer (h):
$−4$

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