Convert 101010 to a number in base 2.
Solution: Use long division method
| 2 | 1010 | ||
| 2 | 505 | R | 0 |
| 2 | 252 | R | 1 |
| 2 | 126 | R | 0 |
| 2 | 63 | R | 0 |
| 2 | 31 | R | 1 |
| 2 | 15 | R | 1 |
| 2 | 7 | R | 1 |
| 2 | 3 | R | 1 |
| 2 | 1 | R | 1 |
| 2 | 0 | R | 1 |
| Answer 1111110010 | |||
Topic: Use of Equality Sign in Statements
Place the equality sign where appropriate. (Source: MM P141 Activity 13.2 Q (ii))
a) 17 + 7 – 5 ? (28 ÷ 7) + 5
Solution
Use BODMAS
i.e. 24 – 5 ? 4 + 15
Therefore, 19 = 19
Therefore, 17 + 7 – 5 = (28 ÷ 7) + 5
b) 2 x 16 ? 3 x 10 + 2
Solution
Use BODMAS
i.e. 32 ? 30 + 2
Therefore, 32 = 32
Therefore, 2 x 16 = 3 x 10 + 2