All categories

3 years ago

How do I subract fractions?

Mathematics

1 answer:

Aliun [14]3 years ago

4 0

How do you subtract fractions?

Make sure the bottom numbers (the denominators) are the same.

Subtract the top numbers (the numerators). Put the answer over the same denominator.

Simplify the fraction (if needed).

To Subtract Fractions with different denominators:

Find the Lowest Common Denominator (LCD) of the fractions.

Rename the fractions to have the LCD.

Subtract the numerators of the fractions.

The difference will be the numerator and the LCD will be the denominator of the answer.

Simplify the Fraction.

How to simplify a fraction:

Find a common factor of the numerator and denominator. ...
Divide both the numerator and denominator by the common factor.
Repeat this process until there are no more common factors.
The fraction is simplified when no more common factors exist.

You might be interested in

Can u answer this plz

ch4aika [34]

1: 0.8
2: 0.4
3: 0.1
4: 0.7
Have a good day and ask questions!!

-Kaylie

6 0

3 years ago

Read 2 more answers

Who whats to talk im here .0.

Vsevolod [243]

Answer:

:( :( :(

Step-by-step explanation:

8 0

1 year ago

Read 2 more answers

Describe and correct the error(s) made in each of the problems below.

ladessa [460]

Answer:

$\displaystyle \frac{1-x}{(5-x)(-x)} =-\frac{x-1 }{ x(x-5)}$

$\displaystyle \frac{5}{s}\times \frac{2}{5} =\frac{2}{s}$

Step-by-step explanation:

Errors in Algebraic Operations

It's usual that students make mistakes when misunderstanding the application of algebra's basic rules. Here we have two of them

When we change the signs of all the terms of a polynomial, the expression must be preceded by a negative sign
When multiplying negative and positive quantities, if the number of negatives is odd, the result is negative. If the number of negatives is even, the result is positive.
Not to confuse product of fractions with the sum of fractions. Rules are quite different

The first expression is

$1-x / (5-x)(-x)=x-1 / x(x-5)$

Let's arrange into format:

$\displaystyle \frac{1-x}{(5-x)(-x)} =\frac{x-1 }{ x(x-5)}$

We can clearly see in all of the factors in the expression the signs were changed correctly, but the result should have been preceeded with a negative sign, because it makes 3 (odd number) negatives, resulting in a negative expression. The correct form is

$\displaystyle \frac{1-x}{(5-x)(-x)} =-\frac{x-1 }{ x(x-5)}$

Now for the second expression

$5/s+2/5=2/s$

Let's arrange into format

$\displaystyle \frac{5}{s}+\frac{2}{5} =\frac{2}{s}$

It's a clear mistake because it was asssumed a product of fractions instead of a SUM of fractions. If the result was correct, then the expression should have been

$\displaystyle \frac{5}{s}\times \frac{2}{5} =\frac{2}{s}$

6 0

2 years ago

How do I solve this???

Llana [10]

You need to split the shape into two then measure the shapes like trapezoids use a+b/2(h) for the formula

5 0

3 years ago

The volume of the box is 60 cubic inches. What are the length, width, and height of the box?

Serggg [28]

Answer: The volume is the product of the Length, Width, and Height: V = LWH.

Step-by-step explanation: We are given V = 240 in.3, and H = 6 in., and L = W + 3 in.

Thus 240 in.3 = (W+3 in.)*W*(6 in.) so W(W+3 in.) = 240 in.3 / 6 in. = 40 in.2

Using the distributive property and moving the constant to the left gives:

W2 + (3 in.)W - 40 in.2 = 0

This factors:

(W + 8 in.)(W - 5 in.) = 0

The first factor gives W = -8 in. which is nonsense because it is negative.

The second factor gives a valid answer of W = 5 in.

8 0

3 years ago