### Chap 2: Real Numbers - Spot the Common Mistakes (III)

Revision Exercise 2 (p52 of Textbook) No. 7(c)

1. line 4. negative 18 should not be reversed, instead 9/5 should be reversed.

2. Line 4- It should be 18/1 not 1/18 and 9/5 should reversed into 5/9.

3. Line 4 negative 18 should remain at 18/1 and 9/5 should be reversed to 5/9

4. The error is in Line 4. The wrong fraction was reversed, 9/5 should be reversed when dividing it.

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5. line 4 9/5 should be the one that is reversed

6. Line 4 is incorrect. It should be 18/1 and not 1/18. 18/1 is the same as 18. Also, 9/5 should become 5/9.

7. In line 4, 18 should remain as 18/1 and should not reversed. Instead, 9/5 should have been reversed.

8. The mistake is made in Line 4.
The reverse is made in the wrong fraction. It should be 5/9 and not 9/5/

9. Line 4: should be -18/1, not -1/18. 9/5 should be 5/9.

10. The mistake can be found on the fourth line. Instead of -1/18 x 9/5,it should be -18 x 5/9.

11. Line four. negative 18 should not be reversed,9/5 should be reversed.

12. Line 4 is wrong. The equation should be -18 x 5/9, not -1/18 x 9/5

13. line 4.it should be -18x5/9 not 1/18x9/5

14. In line 4, -18 should not be reversed to become -1/18. Instead 9/5, should be reversed to make 5/9.