CPM Homework Help : MC2 Problem 5-38

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Home > MC2 > Chapter Ch5 > Lesson 5.1.3 > Problem 5-38

5-38.

Simplify 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 necessarily have 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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