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4 years ago

Describe how to add or subtract rational expressions with like denominators.

Mathematics

2 answers:

Veronika [31]4 years ago

8 0

Answer:if the bottoms are the same keep the the sme

Step-by-step explanation:

Reil [10]4 years ago

3 0

Answer:

1. ½ + ½ = ²/2 = 1

2. ⅝ - ⅜ = ²/8 = ¼

Step-by-step explanation:

Rationals are can take the form of a fraction or decimals.

They are part of a whole.

In add or subtracting Rationals having the same denominator, the operation seems easy and fast.

Let's consider some examples:

ADDITION OF RATIONALS

1. ½ + ½ = ²/2 = 1

How:

In Working with Rationals having thesame denominator, you take the sum of the NUMERATOR and pick just one of the DENOMINATOR.

NUMERATOR: 1+1 = 2.

DENOMINATOR: 2

Operations: 2 ÷ 2 = 1.

2. ⅜ + ⅞ = 10 / 8

How:

Numerator: 3+7 = 10

Denominator: 8

Operations : 10/8 = 5/4

SUBTRACTION:

1. ⅝ - ⅜ = ²/8 = ¼

How:

Numerator: 5-3 = 2

Denominator: 8

Operations = 2/8 = ¼

2. ¾ - ¼ = ²/4 = ½

How:

Numerator: 3-1 = 2

Denominator: 4

Operations : ²/4 = ½

Enjoy mathematics!

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2 years ago

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3 years ago

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How many cubes with edge length of ⅓ inch are needed to fill a rectangular prism that is 3 inches by 1 inch by 1 ⅓ inches?

Galina-37 [17]

Answer:

<em>We need 108 cubes to fill the rectangular prism</em>

Step-by-step explanation:

We are given the dimensions of a cube with an edge length of 1/3 inch.

A rectangular prism is to be filled out with those cubes. The dimensions of the prism are 3 inches x 1 inch x 1 1/3 inches.

The fraction 1 1/3 is expressed as:

$1\frac{1}{3}=1+\frac{1}{3}=\frac{4}{3}$

We need to know how many cubes fit in each dimension. It can be found by dividing them by their edge length:

$\displaystyle \frac{3}{\frac{1}{3}}=3*3 =9$

$\displaystyle \frac{1}{\frac{1}{3}}=1*3 =3$

$\displaystyle \frac{\frac{4}{3}}{\frac{1}{3}}=\frac{4}{3}*3=4$

Now we multiply the number of cube per dimension:

9*3*4=108

We need 108 cubes to fill the rectangular prism

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3 years ago

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FromTheMoon [43]

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Step-by-step explanation:

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4 years ago

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