Advertisements
Advertisements
प्रश्न
Add the following rational numbers:
Advertisements
उत्तर
\[\frac{7}{- 18} + \frac{8}{27} = \frac{- 7}{18} + \frac{8}{27}\]
\[\text{The L.C.M. of denominators 18 and 27 is 54} . \]
\[\text{Now, we will express} \frac{- 7}{18} \text{and} \frac{8}{27} \text{in the form in which they take the denominator 54} . \]
\[\frac{- 7 \times 3}{18 \times 3} = \frac{- 21}{54} \]
\[\frac{8 \times 2}{27 \times 2} = \frac{16}{54}\]
\[\text{So}\]
\[\frac{- 7}{18} + \frac{8}{27} = \frac{- 21}{54} + \frac{16}{54}\]
\[ = \frac{- 21 + 16}{54}\]
\[ = \frac{- 5}{54}\]
\[ = \frac{- 5}{54}\]
APPEARS IN
संबंधित प्रश्न
Add the following rational numbers.
Zero has ______ reciprocal.
Find ten rational numbers between \[\frac{1}{4} \text{and} \frac{1}{2} .\]
Write down a rational number whose numerator is the largest number of two digits and denominator is the smallest number of four digits.
Insert three rational number between:
6 and 7
Ravi multiplied `25/8` and `16/15` to obtain `400/120`. He says that the simplest form of this product is `10/3` and Chandru says the answer in the simplest form is `3 1/3`. Who is correct? (or) Are they both correct? Explain
Every integer is a rational number.
Select those which can be written as a rational number with denominator 4 in their lowest form:
`7/8, 64/16, 36/(-12), (-16)/17, 5/(-4), 140/28`
The diagram shows the wingspans of different species of birds. Use the diagram to answer the question given below:
| Albatross | Sea Gull |
 |
 |
How much longer is the wingspan of an Albatross than the wingspan of a Sea gull?
The table shows the portion of some common materials that are recycled.
| Material | Recycled |
| Paper | `5/11` |
| Aluminium cans | `5/8` |
| Glass | `2/5` |
| Scrap | `3/4` |
Which items have a recycled amount less than `1/2`?
