Question

Evaluate: -4(-1/8 + 0.3)

A. - 1.7
B. - 0.7
C. 0.8
D. 2

Answer 1

`-4(- (1)/(8) + 0.3)`

Rewrite decimal to fraction:

`= -4(- (1)/(8) + (3)/(10))`

Change the denominators to be the same:

`= -4(- (1 * 5)/(8 * 5) + (3 * 4)/(10 * 4))`

Simplify each fraction:

`= -4(- (5)/(40) + (12)/(40))`

Add the fraction in the bracket:

`= -4( (7)/(40))`

Multiply:

`= -(7)/(10)`

Answer 2

Hey there! :)

-4(-1/8 + 0.3)

Simplify this by using the rainbow technique.

(-4 × -1/8) + (-4 × 0.3)

Simplify.

Remember that a negative times a negative is a positive while a positive times a negative is a negative.

(1/2) + (-1.2)

Get rid of parenthesis.

1/2 - 1.2

Change 1.2 into a fraction.

1/2 - 1 2/10

Multiple 1/2 by 5/5 so that both of our fractions have the same denominator.

1/2 · 5/5 = 5/10

So, our new question looks like this :

5/10 - 1 2/10

Change 1 2/10 into an improper fraction.

5/10 - 12/10

Simplify.

-7/10

Change it into a decimal.

-0.7 → b is our final answer :)

~Hope I helped!~