Page 286 - Ganit Kaushal

5. 8 less than – 9 is

(a) –13 (b) –15 (c) –17 (d) 17
6. The sum of 12 and (–32) is

(a) 20 (b) –20 (c) 24 (d) –24
7. The absolute value of | –3 + 2 | is
(a) 1 (b) –1 (c) –5 (d) 5

8. The value of – (5) – (–10) is
(a) 4 (b) 5 (c) –8 (d) –10
9. The number of whole numbers lying between –5 and 5 is

(a) 10 (b) 3 (c) 4 (d) 5
10. 217 + (– 47) – (– 60) is
(a) 150 (b) 180 (c) 210 (d) 230

11. Fill in the blanks.
(a) a and –a are the ________ of each other.
(b) If a is an integer, a + 1 is its ________.

(c) The sum of an integer and its additive inverse is ________.
(d) The negative of a negative number is ________.
(e) Adding +4 to a number means moving 4 steps to the ________ of the number line.

( f ) The absolute value of zero is ________.
(g) The sum of two negative integers is always a ________ integer.

(h) The smallest positive integer is ________.
(i) The largest negative integer is ________.
( j) The additive inverse of zero is ________.

12. State whether the following statements are True (T) or False (F).
(a) The absolute value of 0 is 0.
(b) There is no greatest negative integer.

(c) Every whole number has a predecessor.
(d) 8 + (–15) is an integer.
(e) The sum of any two negative integers is always smaller than both the integers.

(f) The sum of a positive integer and a negative integer is always a negative integer.
(g) The sum of an integer and its negative is always zero.
(h) The sum of three integers can never be zero.

(i) | –7| < | –3 |
(j) –20 is to the left of –21 on the number line.
(k) The sum of two integers is always an integer.

(l) (–15) − (–22) < (–22) − (–15)

284 Mathematics-6