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प्रश्न
Divide: –147 by –21
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उत्तर
–147 by –21
= `(-147)/-21`
= 7
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संबंधित प्रश्न
Use the sign of >, < or = in the box to make the statements true.
23 – 41 + 11 
23 – 41 – 11
Add: 178 and -69
For the following statement write (T) for true and (F) for false:
|8 − 5| = |8| + |−5|
Find an integer a such that: −8 + a = 0
Fill in the blanks:
80 ÷ (......) = −5
Write (T) for true and (F) for false for the following statement:
(−7) ÷ (−1) = 7
Write (T) for true and (F) for false for the following statement:
20 ÷ (−5) = −4
Zero is neither positive nor negative.
An atom changes to a charged particle called ion if it loses or gains electrons. The charge on an ion is the charge on electrons plus charge on protons. Now, write the missing information in the table given below:
| Name of Ion | Proton Charge | Electron Charge | Ion Charge |
| Hydroxide ion | +9 | – | –1 |
| Sodium ion | +11 | – | +1 |
| Aluminium ion | +13 | –10 | – |
| Oxide ion | +8 | –10 | – |
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?
- Bhaskaracharya was born in the year 1114 AD and died in the year 1185 AD. What was his age when he died?
- Turks ruled Egypt in the year 1517 AD and Queen Nefertis ruled Egypt about 2900 years before the Turks ruled. In what year did she rule?
- Greek mathematician Archimedes lived between 287 BC and 212 BC and Aristotle lived between 380 BC and 322 BC. Who lived during an earlier period?
