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Identifying Rational and Irrational Numbers

Add [tex]\(4 + \frac{2}{3}\)[/tex].

Which fraction represents the integer 4?

A. [tex]\(\frac{4}{1}\)[/tex]

B. 4.0

C. [tex]\(\frac{1}{4}\)[/tex]

Sagot :

To solve the question, let's break it down step by step.

### Adding [tex]\( 4 + \frac{2}{3} \)[/tex]
1. Identify Components: We have two terms to add: an integer [tex]\( 4 \)[/tex] and a fraction [tex]\( \frac{2}{3} \)[/tex].

2. Convert the Integer to Fractional Form: The integer 4 can also be viewed as [tex]\( \frac{4}{1} \)[/tex]. This helps in understanding its fractional representation.

3. Add the Two Values: When adding an integer and a fraction, consider:
[tex]\[ 4 + \frac{2}{3} \][/tex]
To add these, think of 4 as a fraction:
[tex]\[ 4 = \frac{4}{1} \][/tex]

4. Find a Common Denominator: The denominators here are 1 and 3. The common denominator will be 3.

5. Adjust Fractions to Have the Common Denominator:
[tex]\[ 4 = \frac{4}{1} = \frac{4 \cdot 3}{1 \cdot 3} = \frac{12}{3} \][/tex]
The second fraction remains:
[tex]\[ \frac{2}{3} \][/tex]

6. Add the Numerators:
[tex]\[ \frac{12}{3} + \frac{2}{3} = \frac{12 + 2}{3} = \frac{14}{3} \][/tex]
Hence, the sum of [tex]\( 4 + \frac{2}{3} \)[/tex] is [tex]\( \frac{14}{3} \)[/tex]. This fraction is equivalent to approximately [tex]\( 4.666666666666667 \)[/tex] in decimal form.

### Fraction Representation of Integer 4

Here we are asked to identify a fraction that represents the integer 4. The correct representation is:
[tex]\[ \frac{4}{1} \][/tex]
This is because:
[tex]\[ \frac{4}{1} = 4 \][/tex]

So, the choices given are:
- A [tex]\( \frac{4}{1} \)[/tex]
- B 4.0
- C [tex]\( \frac{1}{4} \)[/tex]

Clearly, the correct fraction representing the integer 4 is:
[tex]\[ A. \frac{4}{1} \][/tex]

### Conclusion
1. The addition [tex]\( 4 + \frac{2}{3} \)[/tex] gives us approximately [tex]\( 4.666666666666667 \)[/tex].

2. The integer 4 can be represented as the fraction [tex]\( \frac{4}{1} \)[/tex].

The correct answers are:
- For adding [tex]\( 4 + \frac{2}{3} \)[/tex]: [tex]\( 4.666666666666667 \)[/tex]
- The fraction that represents the integer 4 is: Choice A [tex]\( \frac{4}{1} \)[/tex].