Page 50 - ICSE Math 6

PRACTICE TIME

1. Represent –11 and 13 on the number line.

2. Add –4 and –6 on the number line.
3. Subtract –5 from –8 on the number line.
4. Find the value of –20 + (–23) + 12.

5. Find the value of ||–13| – |15||.
6. Evaluate 15 – |–17|.
7. Write the smallest as well as the largest of the negative integers which are greater than –12.

8. Write the smallest and the largest of the negative integers less than –19.
9. Arrange the following integers in an increasing order of their moduli (absolute value).
–23, 56, 0, –129 and –89.
10. The sum of two integers is –56. If one of the integers is –19, find the other integer.

11. Evaluate.
(a) (–9) + (–6) + (+18) (b) 50 + (–45) + 17 + (–77) (c) (–6) + (–10) – 5
(d) (–204) – (–2) + (–3) (e) 106 – (–61) – (+21) (f) 900 – (–5) + 5
12. Arrange the following integers in ascending order.
(a) –2, 12, 0, 5, –6, 9 (b) 10, –9, –11, 8, –16, 2 (c) 9, 18, –20, –1, –6

(d) 14, –13, –12, –11, 18, 7 (e) –21, 20, –22, 15, –15 (f) –10, 9, –9, –23, –6
13. Arrange the following integers in descending order.
(a) –12, 5, –6, 7, –8 (b) –8, –2, 3, 0, –3, 2 (c) 9, –11, –5, 1, –3
(d) –17, 15, –16, 5, 9 (e) –2, –13, –11, 12, 18 (f) –13, –17, 17, 15, 23

14. Last week Ravi’s bank balance was ` 32,000. He first withdrew ` 8,000 and then deposited
` 6,500 after two days. What is his current bank balance?
15. During an experiment, the temperature of a liquid drops by 3°C. If initially it was –2°C, what is
the temperature of the liquid now?
16. A food is to be stored at –24°C. If the present temperature of the storage room is –12°C, by how
much degree Celcius the temperature of the room needs to be changed?

THINK SMART

1. Complete the tables given below.

(a) Second number (b) Second number
+ –3 –6 –8 – 5 –10 9

First number –9 –17 First number 12 +3

0
–7
+21 –18

34