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Locate the following rational numbers by the method of construction.

(a) [tex]\frac{2}{5}[/tex]

(b) [tex]3 \frac{3}{5}[/tex]

(c) [tex]2 \frac{4}{5}[/tex]

(d) [tex]4 \frac{1}{7}[/tex]


Sagot :

Sure! Let's walk through locating each given rational number step-by-step.

### (a) [tex]\(\frac{2}{5}\)[/tex]
This is already a simple fraction, and its decimal form is:

[tex]\[ \frac{2}{5} = 0.4 \][/tex]

So, [tex]\(\frac{2}{5}\)[/tex] is located at [tex]\(0.4\)[/tex] on the number line.

### (b) [tex]\(3 \frac{3}{5}\)[/tex]
This mixed number can be converted into decimal form as follows:

First, express the mixed number as an improper fraction.
[tex]\[ 3 \frac{3}{5} = \frac{3 \times 5 + 3}{5} = \frac{18}{5} \][/tex]

Next, convert the improper fraction to a decimal:
[tex]\[ \frac{18}{5} = 3.6 \][/tex]

So, [tex]\(3 \frac{3}{5}\)[/tex] is located at [tex]\(3.6\)[/tex] on the number line.

### (c) [tex]\(2 \frac{4}{5}\)[/tex]
To convert this mixed number into decimal form:

First, express the mixed number as an improper fraction.
[tex]\[ 2 \frac{4}{5} = \frac{2 \times 5 + 4}{5} = \frac{14}{5} \][/tex]

Next, convert the improper fraction to a decimal:
[tex]\[ \frac{14}{5} = 2.8 \][/tex]

So, [tex]\(2 \frac{4}{5}\)[/tex] is located at [tex]\(2.8\)[/tex] on the number line.

### (d) [tex]\(4 \frac{1}{7}\)[/tex]
To convert this mixed number into its decimal form:

First, express the mixed number as an improper fraction.
[tex]\[ 4 \frac{1}{7} = \frac{4 \times 7 + 1}{7} = \frac{29}{7} \][/tex]

Next, convert the improper fraction to a decimal:
[tex]\[ \frac{29}{7} \approx 4.142857142857143 \][/tex]

So, [tex]\(4 \frac{1}{7}\)[/tex] is located at approximately [tex]\(4.142857142857143\)[/tex] on the number line.

By converting each number to its decimal form as shown, we can locate the positions of these rational numbers on a number line.