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प्रश्न
Remembering that 1AD came immediately after 1BC, while solving these problems take 1BC as –1 and 1AD as +1.
The Greeco-Roman era, when Greece and Rome ruled Egypt started in the year 330 BC and ended in the year 395 AD. How long did this era last?
उत्तर
Taking 1 BC as –1 and 1 AD as +1
Starting year = 330 BC = (–330) AD
Ending year = 395 AD
The era lasted for = 395 – (–330)
= 395 + 330
= 725 years
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संबंधित प्रश्न
Verify a − (−b) = a + b for the following values of a and b. a = 21, b = 18
Subtract: −135 from −250
Find the product: (−8) × 3 × 5
Divide: –161 by 23
Divide: 0 by –278
49 + (−27) = ?
On subtracting −9 from −6, we get
Fill in the blanks.
−23 − (?) = 15.
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| Hydroxide ion | +9 | – | –1 |
| Sodium ion | +11 | – | +1 |
| Aluminium ion | +13 | –10 | – |
| Oxide ion | +8 | –10 | – |
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