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प्रश्न
Simplify:
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उत्तर
\[\frac{- 2}{5} - \frac{- 3}{10} - \frac{- 4}{7}\]
\[\text{Taking the L . C . M .} \hspace{0.167em} \text{of the denominators:} \]
\[\frac{- 28}{70} - \frac{- 21}{70} - \frac{- 40}{70}\]
\[ = \frac{( - 28) - ( - 21) - ( - 40)}{70}\]
\[ = \frac{- 28 + 21 + 40}{70}\]
\[ = \frac{33}{70}\]
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संबंधित प्रश्न
Evaluate each of the following:
What should be added to \[\frac{- 7}{8}\] so as to get \[\frac{5}{9}?\]
Find (x + y) ÷ (x − y), if
Write the following rational number in `p/q` form.
0.37
State, True Or False
`7/9=(-7-5)/(9-5)`
Mark the following pairs of rational numbers on the separate number lines: `3/4` and `- 1/4`
If `r/s` is a rational number, then s cannot be equal to zero.
Every integer is a rational number.
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` |
- Is the rational number expressing the amount of paper recycled more than `1/2` or less than `1/2`?
- Which items have a recycled amount less than `1/2`?
- Is the quantity of aluminium cans recycled more (or less) than half of the quantity of aluminium cans?
- Arrange the rate of recycling the materials from the greatest to the smallest.
Show that x is rational, if x2 = `1 7/9`
