CPM Homework Help : CC2 Problem 6-137

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6-137.

Evaluate each expression.

$1.2-0.8$
Hint (a):
Remember to line up the decimal points when adding or subtracting numbers with decimals.
Answer (a):
$0.4$

$-4-(-2)$
Hint (b):
When you subtract a negative, you add its opposite.

$-\frac{6}{11}-(-\frac{1}{4})$
Hint (c):
Find a common denominator.
More Help (c):
See part (b).

$\frac { 2 } { 3 } \cdot \frac { 2 } { 5 }$
Hint (d):
Multiply the numerators together and the denominators together.
Answer (d):
$\frac{4}{15}$

$0.6·8$
Hint (e):
When you multiply numbers with decimals, you do not need to line up the decimal points.
Answer (e):
$4.8$

$-\frac{5}{4}\cdot\frac{8}{13}$
Hint (f):
Remember, a negative number multiplied by a positive number is always a negative number.

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