Question

arrange the following rational numbers in ascending and descending order: - 13 by 20,6 by 15, 7 by 12, -9 by 10, 3 by 5​

Answer 1

-13 by 20,6 by 15, 7 by 12, -9 by 10, 3 by 5

denominator terms are

20 , 15 , 12 ,10 & 5

We will find LCM of these numbers first

20 = 5×2×2

15= 5×3

12 = 3×2×2

10=5×2

5 = 5

LCM = 5×3×2×2 = 60

lets multiply numerator and denominator to make denominator of each number = 60

$\frac{ - 13}{20} = \frac{ - 13 \times 3}{20 \times 3} = \frac{ - 39}{60}$

$\frac{6}{15} = \frac{6 \times 4}{15 \times 4} = \frac{24}{60}$

$\frac{7}{12} = \frac{7 \times 5}{12 \times 5} = \frac{35}{60}$

$\frac{ - 9}{10} = \frac{ - 9 \times 6}{10 \times 6} = \frac{ - 54}{60}$

$\frac{3}{5} = \frac{3 \times 12}{5 \times 12} = \frac{36}{60}$

ascending order

$\frac{ - 54}{60} \: \: \frac{ - 39}{60} \: \: \frac{24}{60} \: \: \frac{35}{60} \: \: \frac{36}{60}$

-9/10 , -13/20 , 6/15 , 7/12 , 3/5

descending order will be

3/15 , 7/12 , 6/15 , - 13/20 , -9/10

Answer 2

Answer:

Step-by-step explanation:

assending order (smaller to greater )

-9/10  ,-13/20  ,  7/12   ,6/15

desending order (bigger  to  smaller)

6/15  ,  7/12   ,  -13/20  ,   -9/10

please mark as brainlist